TSX Micro PLCs TSX 3705/3708/3710/3720. Implementation Manual (Volume 1)

Display panel

Display of the status of the input/output bits for each slave (R I/O mode)

Introduction

The PLC display panel enables the status of the input/output bits of each slave on

the bus to be displayed.

Procedure for

Carry out the following steps:

access

Step

Action

Initial status of display panel:

local input/output display mode (Base or EXT LEDs on).

A short press on the push button (1) on the TSX SAZ 10 module switches to

R I/O mode with display:

of an address of a slave (1 to 31) on the two panels on the left-hand side

(numerical display),

of the status of the input/output bits relating to the slave displayed, on the

panel on the right-hand side (LED on = bit set to 1, LED off = bit set to 0 or

no inputs / outputs). The LEDs (0 to 3) at the top show the status of the input

bits of the slave (maximum of 4 input bits per slave); the LEDs (0 to 3) at the

bottom show the status of the output bits of the slave (maximum of 4 output

bits per slave),

of the direction of movement in all the slaves, shown by three LEDs being

lit (see Incrementation of the slave number in ascending or descending

order, p. 166): if LEDs 8,13 and 10 are on, movement in the group of slaves

takes place in ascending order; if LEDs 12, 9 and 14 are on, movement

takes place in descending order.

Pressing briefly several times in succession on the push button (2) of the

centralized display makes it possible to change the number of the slave in

ascending order (1 -> 31) or descending order (31 -> 1) depending on the

direction of movement.

Changing direction (ascending or descending) is achieved by a long press on

the push button (1) on the TSX SAZ 10 module.

Returning to the initial status of the display panel is achieved by a short press

on the push button (1) on the TSX SAZ 10 module.

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Display panel

Incrementation of the slave number in ascending or descending order

General points

When the PLC display block is in R I/O mode (display of input/output bits of each

slave), the user can scan the slaves in ascending (1->31) or descending (31->1)

order. The direction is shown by 3 lit LEDs at display panel level, as indicated on the

following diagram. The direction can be changed with along press on the push

button of the TSX SAZ 10 module.

Principle

Diagram

LEDs 12, 9, 14 on

LEDs 8, 13, 10 on

incrementation of

in descending

in ascending

the slave number

order

in descending

order

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Display panel

Specific standard functions

At a Glance

Each TSX 37 PLC and TSX SAZ 10 module features a push button on their front

panels, enabling the operating mode of the central display unit to be changed. The

discrete inputs can be used to carry out the same function as these push buttons.

By default, any changes to the operating mode of the display block are made by the

push buttons.

Offset push

To replace the push button of the central unit with a discrete input, simply:

button of the

initialize the contents of the %SW99 word by program or by setting at the address

display block

of the required input,

validate the function of this input by setting the system bit %S99 to 1, thus

rendering the push button inactive.

The system word %SW99 indicates the geographic address of the discrete input

assigned in place of the push button.

By default, the word %SW99 contains the address corresponding to input %I1.10

(input 10 of the module located in position 1) as the dedicated input for this function.

It is however possible to modify the assignment of the dedicated input for this

function by program (see(Reference manual PL7, volume 2, system words)).

Offset push

To replace the push button of the AS-i module with a discrete input, simply:

button of the

initialize the contents of the %SW98 word by program or by setting at the address

module AS-i TSX

of the required input,

STZ 10

validate the function of this input by setting the system bit %S98 to 1, thus

rendering the push button inactive.

The system word %SW98 indicates the geographic address of the discrete input

assigned in place of the push button.

By default, the word %SW98 contains the address corresponding to input %I1.11

(input 11 of the module located in position 1) as the dedicated input for this function.

It is however possible to modify the assignment of the dedicated input for this

function by program (see(Reference manual PL7, volume 2, system words)).

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Display panel

Management of the battery LED (BAT)

Principle

The switching on of the BAT status LED, which indicates the absence of or an error

in the backup battery, may be inhibited per program or by an adjustment, by setting

the system bit %S66 to 1.

The table below describes the different statuses of the %S66 bit.

Bit No.

Description

%S66

= 0: BAT LED is on when the back-up battery is absent or faulty.

= 1: BAT LED off.

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Display of language objects

At a Glance

Aim of this

This chapter deals with the display of language objects.

Chapter

What's in this

This Chapter contains the following Maps:

Chapter?

Topic

Page

WORD mode

170

Word of order and status : %SW67

171

Index word : %SW68

173

Word %SW69

175

Example : word display in hexadecimal mode

176

Example : word display in binary mode

178

Example : display of the internal bit status

181

Example: Display of remote inputs/outputs on TSX 07

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169

Display of language objects

WORD mode

General

The Display of language objects comes from the 3 panels of 32 LEDs, which allow

the display of the value of 256 bits or 16 words max., when the WORD mode is

activated. The display of the words can be binary, which allows 4 consecutive words

or hexadecimal alphanumerics to be displayed. In this case, one single word is

displayed with most/least significant alternation.

It is possible to display the %M, %Si or %Xi bits, the %MWi, %SWi or %KWi words

and the remote discrete inputs/outputs delivered by TSX 07 PLCs.

Principle

The WORD mode is activated by setting the %S69 bit system to 1, which is signaled

by the WRD LED being lit. In this mode, the push button will scroll the value

displayed (most/least significant in the hexadecimal base) or the values displayed

(4 words then 4 following words etc. in the binary base).

The installation of the display is performed by the 3 system words %SW67, %SW68

and %SW69, which define respectively :

the order information and the mode status (type of objects displayed, display

base etc.),

the current index of the displayed objects (64 bit group number or word order in

the table defined by the maximum index and the word %SW69) and the maximum

index (number of words in the word table),

the number of the first word in the word table.

Illustration

Principle diagram:

Most significant display

Least significant display

Error

Direction of movement

Binary/hexadecimal

Reserved

Type of object

maximum index

Current index

Number of first object

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Display of language objects

Word of order and status : %SW67

Type of objects

These 4 bits configure the type of objects to be displayed:

(0 to 3 bits)

0 : %MWi (default),

1 : %SWi,

2 : %kWi,

8 : %Mi,

9 : %Si,

A : %Xi,

B : %I and %Q of the TSX 07 PLCs.

Binary/

This bit configures the display base of the word objects:

Hexadecimal

0 : Binary,

(bit 4)

1 : Hexadecimal (default),

Direction of

This bit configures the direction of movement in the word table or in the bit group:

movement

the movement is caused by pressing the push button:

(bit 5)

0 : positive direction, i.e. ascending direction of index (default),

1 : negative direction, i.e. descending direction of index.

Most/least

These bits configure the way of displaying a word in hexadecimal mode:

significant

Most significant

Least significant

Meaning

display

display (bit 7)

display (bit 6)

(bits 6 and 7)

Combination prohibited! Causes error bit to

be set at 1 (bit 15).

Permanent display of the least significant

byte.

Permanent display of the most significant

byte.

Alternating display of the least significant

byte (2s duration) and the most significant

byte (2s duration).

Default combination.

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171

Display of language objects

Index word : %SW68

Word objects

Words that can be displayed are handled in the form of a table (16 words max. with

(%MWi, %SWi

the same table), of which the first object has a 0 index and the last one the last

and KWi)

maximum index (15 max.). In hexadecimal display, the current index is the index of

the only word being displayed.

Supposing, for example, that a table has 8 internal words from %MW12 to %MW19.

The current index can take a value from 0 to 7, which determines the word displayed:

0 displays the content of the word %MW12, 1 displays that of %MW13, etc. and 7

that of %MW19.

In binary display, the current index is that of the first 4 words displayed (word

displayed by the first 16 LEDs in the first display panel).

Supposing, for example, that the same table has 8 internal words from %MW12 to

%MW19.

The current index can take a value from 0 to 7, which determines the 4 consecutive

words displayed:

Current index

Words displayed

%MW12, %MW13, %MW14 and %MW15

%MW13, %MW14, %MW15 and %MW16

%MW14, %MW15, %MW16 and %MW17

%MW15, %MW16, %MW17 and %MW18

%MW16, %MW17, %MW18 and %MW19

%MW17, %MW18, %MW19 and %MW12

%MW18, %MW19, %MW12 and %MW13

%MW19, %MW12, %MW13 and %MW14

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Display of language objects

Bit objects (%Mi, the bits are always displayed in groups of 64, therefore the maximum index is not

%Si and %Xi)

used for these types of objects. The current index indicates the group number during

display.

bit table and corresponding index:

Bits

Index

For the 256 internal

current index 0 corresponds to %M0 to %M63 bits,

bits %Mi

current index 1 corresponds to %M64 to %M127 bits,

current index 2 corresponds to %M128 to %M191 bits,

current index 3 corresponds to %M192 to %M255 bits,

For the 128 system

current index 0 corresponds to %S0 to %S63 bits,

bits %Si

current index 1 corresponds to %S64 to %S127 bits,

For the 128 Grafcet

current index 0 corresponds to %X0 to %X63 bits,

step bits (96 for the

current index 1 corresponds to the %X64 to %X127 bits (to %X95

TSX 37-10)

for the TSX 37-10)

Remote input/

The inputs/outputs of 2 consecutive TSX 07 PLCs on the offset input/output bus are

output bit

displayed in the first 2 display panels. The inputs are displayed by 16 LEDs located

objects (%I and

in the upper part of the panels and the outputs by the 16 LEDs located in the lower

%Q)

part. For these types of objects, the current index corresponds to the TSX 07 link

address, displayed in the first display panel.

Whatever the type of displayed object, the current index is displayed by the 16 LEDs

located in the lower part of the third display panel. Each press on the push button

increases or decreases this index, according to the configured direction of

movement (bit 5 of the system word %SW67).

Illustration:

Push button

Current index

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Display of language objects

Word %SW69

General points

Contains the number of the first word of the table, i.e. the number of the first word to

be displayed. Remember that a maximum of 16 words can be displayed, with 4

words displayed simultaneously in binary mode and one single word displayed in

hexadecimal mode. To facilitate identification of the word(s) currently being

displayed, you are advised to choose a first word, whose address is 0 or a multiple

of 10.

The first word currently being displayed is defined by the current index (see Index

word : %SW68, p. 173).

The word %SW69 is not used with bit objects.

Value of the

following a prior mode deactivation (setting %S69 bit to 0)

system words

Deactivation of WORD mode does not alter the content of the 3 system words.

%SW67 to

Upon reactivation (setting %S69 to 1), the system words %SW67 to %SW69

%SW69 upon

revert to their value at the time of the last mode deactivation. You are however

activating WORD

advised to reinitialize the current index each time you enter the mode, in order to

mode

avoid uncertainty caused by an accidental press on the push button.

after a warm start

The 3 system words revert to their value at the time of the power failure.

after a cold start

The 3 system words are initialized to the following values:

%SW67 = H’xxD0’ -> display of the internal words %MW in hexadecimal

mode, alternating between the most and least significant. Movement in the

table is performed via incrementation,

%SW68 = H’0F00’ -> display of the index word 0 and movement to index word

15, by pressing the push button,

%SW69 = H’0000’ -> the first word in the table has the number 0 (%MW0).

by default and without any special programming, it is possible to display the content

of the internal words %MW0 to %MW15.

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Display of language objects

Example : word display in hexadecimal mode

Text display

The content of the 4 internal words %MW6 to %MW9 can be displayed in

alphanumeric hexadecimal mode. The values of these words are H’1234’, H’5678’,

H’9ABC’ and H’DEF0’, respectively.

To do this, the content of the system words %SW67 to %SW69 is as follows:

Most/ least significant alternation

Incrementation of words

Hexadecimal

%MWi

%SW67 = 0 0 000000 11 0 1 0000

Maximum index : 3 (4 words %MWi)

Current index: 0 (%MW6 displayed)

%SW68 = 00000011 00000000

First word on the table : 6

(%MW6 displayed)

%SW69 = 0000000000000110

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Display of language objects

Display on the

Current index = 0, the first two panels alternately display the most/least significant

PLC

content of the first word in the table (%MW6); namely "12" and "34". The arrows ->

or <- indicate that the right part of the word (least significant) or the left part of the

word (most significant), respectively, will be displayed at the next alternation (every

2s).

Illustration:

Current index

A short press on the push button increases the current index, which becomes equal

to 1 (the 1 LED is therefore lit and the 0 LED is off). The content of the next word in

the table (%MW7) is displayed with the most and least significant alternating,

namely "56" and "78".

Successive presses on the push button will display all the words in the following

sequence: %MW6 -> %MW7 ->%MW8 ->%MW9 -> %MW6 -> etc...

Illustration:

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177

Display of language objects

Example : word display in binary mode

Text display

The content of the 4 internal words %MW6 to %MW9 can be displayed in binary

mode. The values of these words are H’1234’, H’5678’, H’9ABC’ and H’DEF0’,

respectively.

The content of the system words is as follows:

Incrementation of words

Binary

%MWi

%SW67 = 0 0 000000 00 0 0 0000

(type of object = 0)

Maximum index : 3 (4 words %MWi)

Indice courant : 0 %MW6 displayed)

%SW68 = 00000011 00000000

First word in the table : 6 (%MW6)

%SW69 = 0000000000000110

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Display of language objects

Display on the

Illustration:

PLC

Contents of the %MW6 word defined by

Contents of the %MW8 word :

the current index (first word in the table) :

%MW8 = 10011010101111100

%MW6 = 0001001000110100

Sign X, indicating a

binary display

Current index = 0

Contents of the %MW9 word :

%MW9 = 1101111011110000

Contents of the %MW7 word :

%MW7 = 0101011001111000

A short press on the push button increases the current index, which takes the value

1. The upper part of the first panel displays the content of the index word 1 in the

table (%MW7), the lower part of the first panel displays the content of %MW8, the

upper part of the second panel displays the content of %MW9 etc.

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179

Display of language objects

Illustration:

Contents of the %MW7 word

Contents of the %MW9 word

defined by the current index

Sign X, indicating a

binary display

Current index = 1

Contents of the %MW6 word

Contents of the %MW8 word

Successive presses on the push button display all the words, by shifting a 4-word

window among the maximum possible 16 (limited to 4 in the example above). The

index of the word displayed in the upper part of the first panel is defined by the

current index (lower part of the third panel).

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Display of language objects

Example : display of the internal bit status

Text display

The status of the 256 internal bits in the TSX 37 PLC can be displayed (%M0 to

M255). Upon WORD mode activation and if the current index is 0, the status of the

first 64 internal bits is displayed (%M0 to M63).

Display on the

Illustration:

PLC

Sign X, indicating a

binary display

Current index = 0

State of the %M0 to %M63 bits

A short press on the push button increases the current index (value 1), which

displays the status of the next 64 internal bits (%M64 to %M127) and then from

%M192 to %M255; the current index adopts the values 0, 1, 2 and 3 successively.

LED table:

Index

LEDs

%M0

%M1

%M4

%M8

%M15

%M64

%M65

%M68

%M72

%M79

%M128

%M129

%M132

%M136

%M143

%M192

%M193

%M196

%M200

%M207

%M32

%M33

%M36

%M40

%M47

%M96

%M97

%M100

%M104

%M111

%M160

%M161

%M164

%M168

%M175

%M224

%M225

%M228

%M232

%M239

%M48

%M49

%M52

%M56

%M63

%M112

%M113

%M116

%M120

%M127

%M176

%M177

%M180

%M184

%M191

%M240

%M241

%M244

%M248

%M255

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Display of language objects

Example: Display of remote inputs/outputs on TSX 07

Text display

The remote 4 TSX 07 PLC inputs/outputs can be displayed, connected to the remote

input/output bus. By activating the mode and if the current index is worth 1, the first

block displays the address 1 PLC inputs/outputs and the second block displays

those of the address 2 PLC. By pressing the push button the current index is

increased, which displays in the first block the address 2 PLC inputs/outputs and in

the second block those of the address 3 PLC, etc. Continuous pressing on the push

button allow all the remote inputs/outputs to be displayed.

Display on the

Illustration:

PLC

State of the 14 PLC address 2

State of the 14 PLC address 1 inputs

inputs (first 14 LEDs)

(first 14 LEDs)

Sign X, indicating

a binary display

current index = 1

State of the 10 PLC address 2

State of the 10 PLC address 1 outputs

outputs

(first 10 LEDs)

Table of inputs/outputs:

Index

TSX 07

Inputs/Outputs

Address 1

%I\4.0\1.0 à %I\4.0\1.13

Address 2

%I\4.0\2.0 à %I\4.0\2.13

Address 3

%I\4.0\3.0 à %I\4.0\3.13

Address 4

%I\4.0\4.0 à %I\4.0\4.13

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Display of language objects

Index

TSX 07

Inputs/Outputs

Address 2

%I\4.0\2.0 à %I\4.0\2.13

Address 3

%I\4.0\3.0 à %I\4.0\3.13

Address 4

%I\4.0\4.0 à %I\4.0\4.13

Address 1

%I\4.0\1.0 à %I\4.0\1.13

Address 2

%I\4.0\2.0 à %I\4.0\2.9

Address 3

%I\4.0\3.0 à %I\4.0\3.9

Address 4

%I\4.0\4.0 à %I\4.0\4.9

Address 1

%I\4.0\1.0 à %I\4.0\1.9

Address 1

%I\4.0\1.0 à %I\4.0\1.9

Address 2

%I\4.0\2.0 à %I\4.0\2.9

Address 3

%I\4.0\3.0 à %I\4.0\3.9

Address 4

%I\4.0\4.0 à %I\4.0\4.9

Illustration:

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Commissioning

The diagram below shows the procedure that must be followed when switching on

for the first time, according to the state of the monitors:

Starting up

the PLC

PLC self tests

CPU error

No application

in the PLC

“PLC in error” state

“PLC” state

not configured”

Transferring a valid

application in the PLC

“PLC stop” state

Putting the PLC in

RUN

“PLCfunctioning”state

“PLC in software error or

HALT” state

Supply fault

LED off

LED blinking

“PLC waiting” state

LED illuminated

Not determined

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Commissioning

Description of PLC states

General

Table of PLC states and their description:

State

Description

PLC self tests

The PLC processor carries out its sef-tests internally. The PLC

does not control the process and cannot communicate via its

terminal port (or networks).

This state is signaled by the 3 monitors RUN, ERR et I/O

blinking.

"PLC in error" state

The PLC stops following a material breakdown or an error

within the system. The process is no longer controlled,

communication becomes impossible and only a cold-start is

possible (by activating the RESET button, using the gripper,

etc.)

This state is signaled by the monitors RUN, which is switched

off and ERR, which is switched on.

"non-configured" PLC

The PLC started but does not possess any valid applications.

state.

It does not control the process but can communicate by its

terminal point (or its network). This state is signaled by the

monitors RUN, which is switched off and ERR, which flashes.

"PLC in software error or

The PLC application went to "overrun" or executed an

HALT" state

unresolved jump, a HALT instruction or a non-implemented

"floating" instruction. This state is signaled by the monitors

RUN and ERR blinking.

"PLC stop" state

The PLC possesses a valid application, which is stationary (the

application is in a initial state, the tasks are stopped at the end

of the cycle) and the commands of the process are in a state of

fallback. This state is signaled by the RUN monitor blinking.

"PLC functioning" state

The PLC application runs as normal in order to control the

process. A non-blocking fault for the application (input/output

error or software error) can also exist. This state is signaled by

the monitor RUN, which is switched on (and the I/O module is

switched on if there are input/output errors).

"PLC waiting" state

The PLC has detected a supply failure. It is in a backup state

while waiting for the supply to return (attempt at restarting

warm). The process is no longer controlled and communication

is possible. As long as the supply allows it, this status is

signaled by the RUN monitor, which is off and the ERR monitor,

which is on.

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Maintenance

Researching the errors from PLC status monitors.

General

The status monitors in the display block inform the user on the operating mode of

the PLC but also on its possible faults. The errors detected by the PLC concern:

the PLC component circuits and/or its modules: internal errors,

the process controlled by the PLC or the process wiring: external errors,

the operating of the application carried out by the PLC: internal or external errors.

Errors are detected at start-up (self-tests) or during operation; as is the case with the

majority of hardware errors, during the exchanges with the modules or during the

execution of an instruction program. With certain "serious" errors, the PLC must be

restarted; others are the responsibility of the user who decides on the course of

action according to the desired application level.

There are three types of error:

non-blocking errors,

blocking errors

and central unit errors.

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Maintenance

Non-blocking faults

Anomaly caused

The anomaly can be processed by the user program and does not modify the state

by an input/

of the PLC.

output error or

This type of anomaly is signaled by:

by the execution

the I/O status LED,

of an instruction

the LEDs of channels accessible in diagnostics mode (See Display of remote

inputs/outputs on the AS-i bus, p. 161),

the error bits and words associated with the module and channel: %Ix.MOD.ERR,

%IX.i.ERR, %MWx.MOD.2, etc.

the system bits %S10 and %S16 (see reference manual, volume 3).

LED status table:

RUN

ERR

I/O

DIAG

System bits

Faults

%S10

Channel supply fault.

%S16

Tripped channel.

Module missing.

Module does not conform to

the configuration.

Module failure (*)

Module supply fault.

Legend:

LED off

DIAG: channel LED

LED blinking rapidly

DIAG: all the module LEDs

LED on

State not

determined

LED blinking slowly

(*) While operating a PLC with a VL < 2.0 rating, any modification to the physical

configuration, which must be made when the power is off, needs a cold start to

be carried out by pressing the RESET button after power up in order to take effect.

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Maintenance

Anomaly caused

When an application is stored on the PLC, a PCMCIA card backup battery error is

by a faulty RAM-

indicated by:

type PCMCIA

the ERR LED blinking, and the RUN LED lighting up if the PLC is in RUN mode,

memory card

the ERR and RUN LEDs blinking simultaneously if the PLC is in stop mode.

backup battery

LED status table:

PLC state

RUN

ERR

System bits

Faults

RUN

%SW67 = 1

PCMCIA RAM backup battery error

with PLC in RUN

STOP

PCMCIA RAM backup battery error

with PLC in RUN.

The RUN and ERR LEDs blink

simultaneously.

Legend

LED blinking rapidly

LED on

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Maintenance

Blocking faults

General points

These faults, caused by the application program, make it impossible to continue

execution but do not lead to a system fault. If such a fault occurs, the application

stops immediately (all tasks on the current instruction are stopped). There are two

possibilities for restarting the application:

with INIT or by setting the %S0 bit to 1. The application is thus in a preliminary

state: the data have their initial values, the tasks are stopped at the end of the

cycle, the view of the inputs is refreshed and the outputs are placed into a fallback

position,

by STOP, which brings the tasks to the end of the cycle without reinitializing the

data, then by RUN, which makes a restart possible.

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Maintenance

Indicating a

A blocking fault is indicated by:

blocking fault

the status LEDs (ERR and RUN),

the system bits %S15 to %S20 (the system bits %S15, %S18 and %S20 are only

blocking in application monitoring mode),

the system word %SW125 containing the cause of the fault,

the diagnostics program tool of the PL7 Micro which clearly communicates the

cause and origin of the switch to fault status: watchdog overrun, division by zero,

index overflow, etc.

LED status table:

RUN

ERR

I/O

Bits

%SW125

Faults

%S11

H’DEB0’

Watchdog overrun.

H’2258’

Execution of the HALT instruction.

H’DEF8’

Execution of an unresolved JUMP.

H’2xxx’

Execution of an unknown NPCALL.

H’0xxx’

Execution of an unknown primitive

OF/IOB.

H’DEF7’

Grafcet fault: step not programmed

or active step table overrun.

H’DEFF’

Non-implemented floating point.

%S18

H’DEFo’

Division by zero.

%S15

H’DEF1’

Character string manipulation error.

%S18

H’DEF2’

Capacity overflow.

%S20

H’DEF3’

Index overflow.

Legend:

LED flashing

State not

determined

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Maintenance

Central processing unit (CPU) faults

General points

These severe faults (hardware or software) mean that correct system operation can

no longer be guaranteed. They lead to a stop in the PLC, and require a cold start.

Where possible, the fault type is memorized in the %SW124 system word; this can

be reread after the cold start.

The next cold start is forced to stop to prevent a PLC error from recurring.

LED status table:

RUN

ERR

I/O

%SW124

Faults

H’30’

System code fault.

H’60’ to H’64’

Stack overflow.

H’90’

Interruption system fault: Unforeseen IT.

H’53’

Time-out fault during I/O exchange.

Legend:

LED off

LED on

State not

determined

Note: All LEDs (RUN, TER, I/O, ERR) are lit if the handle is missing on a TSX 37

2•.

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197

Maintenance

Updating the Operating System

At a Glance

The operating system of the TSX Micro PLCs can be updated by a download via the

terminal port.

Note: The updating procedure for the operating system is described in the on-line

help associated with the PL7 software.

A write-protection switch located in the backup battery access hatch provides

protection for accessing the loading of the OS.

When the PLC is operating normally, this switch must be in the (OS protected)

position.

Any non-compliance with this notice, whilst not affecting the operation of the PLC,

will nevertheless cause PRG characters to flash on the central display.

Illustration

The following illustration shows the position of the write-protection switch.

protected

Protection

switch

Write

authorized

198

TSX DM 37 xxE

Maintenance

Updating the OS The tool OS LOADER, provided with PL7, acts as a guide for the user during the

update phase, indicating in particular that:

the write-protection switch must be in the write authorized position in order to be

able to begin downloading the OS,

the write-protection switch must be in the OS protected position once the OS has

finished downloading.

Note: If the OS is updated with the tool OS-LOADER V1.5, you must be sure to put

the protection switch in the "write authorized" position before starting the download,

as this version of the tool does not guide the user through the entire update phase.

Likewise, once loading is complete, the switch must be put in the "OS protected"

position.

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TSX Micro PLCs TSX 3705/3708/3710/3720. Implementation Manual (Volume 1) - page 5