The Debugging function. Schneider Electric PL7 Junior/Pro - Premium PLC Applications - Analog, Regulation PID, Weighing

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The Debugging function

At a Glance

Aim of this

Chapter?

What's in this

Chapter?

This chapter looks at the debugging function and commands in analog input/output modules.

This Chapter contains the following Maps:

Topic

Introducing the Debugging Function of an analog module

Description of an analog module debugging screen

Analog module diagnostics

Forcing/unforcing analog channels

Detailed analog channel diagnostics

Modifying the channel filtering value

Aligning an input channel

Modifying the fallback value of an output

Calibration function for an analog module

Page

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Debugging

Introducing the Debugging Function of an analog module

Introduction

Procedure

This function is only accessible in online mode. Debugging is used for each input/ output module of the application: l to display the parameters of each of its channels (channel state, filtering value, etc.), l to access the diagnostics and adjusting function for the selected channel (forcing the channel, masking the channel, etc.).

The function also gives access to the module diagnostics in the case of a fault.

The table below shows the procedure for accessing the Debugging function:

Step

Action

Switch to on-line mode.

Double-click on the module in hardware configuration.

Result : The module Debugging screen then appears.

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Debugging

Description of an analog module debugging screen

At a Glance

Illustration

The debugging screen displays the value and status for each channel in the selected module in real-time. It also enables the user to access the channel command

(forcing the input or output value, reactivation of outputs, etc.).

The debugging screen is composed as follows:

TSX AEY 420 [RACK 0 POSITION 6]

Debugging

Designation: 4E ANA. RAPIDES HN. Version: 1.0

Channel

Symbol F

Global unforcing

ERR

DIAG..

-4

-2

-3

Value

RUN ERR IO DIAG...

Adjusting Channel 2

Display

Range +/-10V

-100000 to 10000

Forcing

Event

Threshold 0:

Threshold 1:

Alignment

Target value

Confirm

Force

Unforce

Confirm

Offset

Reset

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Debugging

Description The table below presents the different elements of the debugging screen and their functions.

Address Element

Title bar

Drop-down menu

Function

Indicates the reference of the selected module and its physical location as well as the rack number for the rack-mounted modules or the FIPIO connection point for the remote input/ outputs.

Enables selection: l of the debug phase: l l

Configuration,

Debugging (diagnostics), only possible when in online mode, l l Calibration (for input modules).

of channels by type (input or output), when the specified module contains both inputs and outputs.

Module zone Displays the name of the selected module as well as a copy of the module status LEDs

(Run, Err, I/O).

Provides direct access: l to module diagnostics when the module has an error (indicated by the LED integrated in the diagnostics access button switching to red), l to the Global unforcing function for channels.

Note: Displaying this zone is optional. The selection is made using the View

→

Module zone command.

Channel zones

Command zone

Displays the value and status for each channel in the module in real-time. The symbol column displays the symbol associated with the channel when the user has defined this

(from the variables editor).

Provides direct access: l to channel-by-channel diagnostics when channels have an error (indicated by the LED integrated in the diagnostics access button switching to red), l to the output reactivation command.

Gives access to the commands of a channel.

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Debugging

Analog module diagnostics

At a Glance

Procedure

The Module diagnostics function displays errors when they occur, classified l l l according to category: internal errors (module breakdown, running self-test), external errors (terminal block fault), other errors (configuration error, module missing or switched off, faulty channel(s)

(details in channel diagnostics)).

A module error is indicated by a number of LEDs changing to red, such as: l l l l in the rack-level configuration editor: l the module position LED, in the module-level configuration editor: the Err and I/O LEDs, depending on the type of error, the Diag LED.

The table below shows the procedure for accessing the Module diagnostics screen.

Step

Action

Open the module debugging screen.

Click on the Diag button in the module zone.

Result: The list of module errors appears.

Module diagnostics

Internal faults External faults Other faults

Terminal block

Note: It is not possible to access the module diagnostics screen if a configuration error, major breakdown error or module missing error occurs.

The following message appears on the screen: " The module is missing or different from that configured for this position ."

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Debugging

Forcing/unforcing analog channels

At a Glance

Procedure

This function is used to modify the state of all or some of the channels of a module.

The state of a forced output is fixed and cannot be modified by the application until after unforcing.

Note: However, in the case of a fault involving an output fallback, the state of the outputs takes the value defined on configuration of the Fallback mode parameter.

The various commands available are: l for one or several channels: l forcing to the indicated value, l l unforcing (when the selected channel(s) are forced, for all the channels of a module (when at least one channel is forced: l global channel unforcing.

The table below shows the procedure for forcing or unforcing all or some of the channels of a module:

Step

Action for a channel

Open the module debugging screen.

Double-click in the cell in the Value column of the required channel (1).

Enter the required value in the Forcing box.

Click on the Force button.

Result : an F appears in the column F

Adjusting Channel 2

Display

Range +/-10V

-100000 to 10000

Forcing

Force

Unforce

Event

Confirm

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Debugging

Step Action for a channel

(1) The Channel adjustment screen can also be accessed by right-clicking on the required channel then left-clicking on the Properties button.

It is possible to disable forcing of all the channels of a module with the command button Global unforcing in the Debugging screen.

TSX AEY 420 [RACK 0 POSITION 6]

Debugging

Designation : 4 FAST HN. ANALOG INPUT Version : 1.0

Global Unforcing RUN ERR IO DIAG...

Rules to be respected

It is only possible to force an output when the task associated with this output is in

RUN mode. If the task is in STOP mode, forcing is accepted but not applied; the output is in Fallback/Maintain mode.

If an output is in forced state, it switches to Fallback/Maintain mode when the associated task switches to STOP mode. When this task returns to RUN mode, the output takes the forced value again.

A forced channel cannot be reconfigured in online mode.

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Debugging

Detailed analog channel diagnostics

At a Glance The Channel diagnostics function displays errors when they occur, classified according to category: l internal faults: l Module failure l external faults: l sensor link fault l l terminal block fault range overshoot or undershoot fault l l calibration fault cold junction compensation fault l other faults: l terminal block fault l l configuration fault communication error l l application error

24V power supply fault l value outside limits l channel not ready

A faulty channel is indicated by the Diag LED in the Err column in the configuration editor switching to red.

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Procedure

Debugging

The table below shows the procedure for accessing the Channel diagnostics screen.

Step

Action

Open the module debugging screen.

For the faulty channel, click on the Diag button in the Err column.

Ch.

Symbole F ERR

DIAG..

-4

-2

-3

Value >

Result: The list of channel errors appears.

Channel diagnostics

Internal faults External faults Other faults

Terminal block

Forced channel

Note: The channel diagnostics information can also be accessed by program

(refer to the Shared task functions manual: READ_STS instruction).

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Debugging

Modifying the channel filtering value

At a Glance This function is used to modify the filtering value of one or several channels of an l l l l analog module.

The available commands are:

0 : no filtering,

and

: low filtering,

: medium filtering,

: high filtering.

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Debugging

Procedure

Step

The table below gives the procedure for changing a filtering value.

Action for a channel

Access the debug screen.

Select the channel to be modified in the channel zone and double-click in the corresponding box in the

Filter box.

Click on the little arrow in the box in the Filtering field of the Channel adjustment dialog box, and define the new selected filtering value in the drop-down menu.

Result : The Channel adjustment dialog box appears.

TSX AEY 1600 [RACK 0 POSITION 9]

Debugging

Designation: 16E ANA. HIGH LEVEL Version: 0.4

Channel Symbol F

Global unforcing RUN

ERR

DIAG..

Value

-252

-193

-188

-177

-166

-177

-257

-198

-182

-177

-171

-166

-182

Filter

ERR

Adjusting Channel 7

DIAG...

Display

Range +/-10V

-100000 to 10000

Forcing

Force

Unforce

Filtering

Alignment

Confirm

Offset

Reset

Confirm the choice by closing the Channel adjustment dialog box.

The new filtering value then appears in the box corresponding to the selected channel in the Filter column of the channel zone.

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Debugging

Aligning an input channel

At a Glance

Procedure

The procedure for aligning an input is used to add an offset value to the value measured by this input, in order to compensate for a sensor shift (e.g. to adjust to 0

°C the measurement of a Pt100 probe immersed in a bucket of ice for adjustment).

The table below shows the procedure for aligning an input channel:

Step Action for a channel

1 Access the debug screen.

2 Select the channel to be aligned in the channel zone and double-click on the corresponding box in column A .

3 Click on the box in the Target value field in the Alignment dialog box and enter the new alignment value.

4 Confirm this new alignment value by clicking on the OK button.

Result : The new offset value is applied and appears in column A .

Channel 3 adjustments

Display

Range +/- 10V

-10000 to 10000

Forcing

0 Force

Unforce

Filtering

0 Confirm

Align

Target value

1964

Confirm

Offset

Reset

5 Close the Channel adjustment dialog box.

Notes

Note: When the alignment offset is modified by program with the WRITE_PARAM instruction (see

Shared task functions manual), its value must be between +1500 and –1500.

Note: The calculated offset value does not take into account the "keyboard" commands given by the user. Running the program (RUN), which also controls the alignment, simultaneously, renders the offset invalid.

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Debugging

Modifying the fallback value of an output

At a Glance

Procedure

When an output is configured in Fallback mode, the corresponding button is valid but the Fallback/Maintain information is grayed out, because the fallback mode cannot be modified in Debugging mode. However, it is possible to change the fallback value by entering a new value.

The table below summarizes the procedure for modifying the fallback value:

Step

Action for a channel

Access the debug screen.

Select the channel in the channel zone and double-click in the corresponding box in the Fallback column.

Click on the box in the Value field in the Fallback dialog box and enter the new fallback value.

The value must be: l For TSX ASY 800 and ASY 410 software version modules < 1.0, l between -10000 and 10000 in range 10 V, l l between 0 and 10000 in ranges 0..20 mA and 4..20 mA,

For TSX ASY 800 and ASY 410 software version modules > 1.0, l l between -10500 and 10500 in range 10 V, between 0 and 10500 in ranges 0..20 mA and 4..20 mA.

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Debugging

Notes

Step

Action for a channel

Confirm this new value by clicking on the OK button.

Result : The new fallback value is applied and appears.

TSX AEY 410 [RACK 0 POSITION 4]

Debugging

Designation: 16I ANA. HIGH LEVEL Version: 0.4

Channel

Symbol

Global unforcing

F ERR

DIAG.

Value

RUN ERR

Fallback

IO DIAG ...

Display

Range +/-10V

-100000 to 10000

Forcing

0 Force

Unforce

Fallback

Fallback Maintain

Value:

0 Confirm

5 Close the Channel adjustment dialog box.

Note: The fallback value can also be modified by program, with the

WRITE_PARAM instruction (see Shared task functions manual).

Note: The fallback value cannot be modified on TBX modules.

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Debugging

Calibration function for an analog module

Introduction This function is only accessible in online mode. It is used to recalibrate the channels of each analog input module of an application.

Calibration is used to correct the long-term module drift. It can also be used to optimize the precision of the measurement at ambient temperatures other than 25 degrees C.

Procedure Procedure for accessing the Calibration function:

Step Action

1 Double-click on the module in hardware configuration.

Result : The Debugging screen appears.

2 In the drop-down menu at the top left, select the Calibration function to make the Calibration screen appear.

TSX AEY 1600 [RACK 0 POSITION 9]

Calibration

Configuration

Debugging

Calibration

HIGH LEVEL

RUN ERR IO DIAG...

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Debugging

Introduction to the calibration screen

This screen displays the state of each of its channels in real-time and enables their calibration to be accessed.

Screen view:

2 Calibration

Designation: 16I ANA. HIGH LEVEL

RUN ERR IO DIAG ...

Channel Symbol F ERR

DIAG..

Value

-258

-198

-188

694

-177

-182

-263

-204

-188

-182

-177

-172

-188

Different functions of the calibration screen

Address Function

1 This panel gives the module catalogue reference and slot in the PLC (rack and position).

2 This command zone displays the function in progress (Calibration function) and is used to select the Configuration or Debugging function from a dropdown list box. By activating the Calibration checkbox, the calibration of the channels (TSX AEY 800 / 810 / 1600, TBX AES 400, TBX AMS 620) or of the selected channel (TSX AEY 414) can be accessed.

This zone at "module" level contains the module name and version.

This zone at "channel" level displays the ERR information for each channel: all the measurements are invalid; filtering and alignment are inhibited.

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Use

List

Debugging

For TSX AEY 800 / 810 / 1600, TBX AES 400 and TBX AMS 620 modules, only channel 0 needs to be calibrated for all the module channels to be calibrated.

For the TSX AEY 1614 module, only channels 0 and 8 need to be calibrated for all the module channels to be calibrated.

For the TSX AEY 414 module, general channel calibration must be performed.

The different calibration procedures are described in each section referring to input l l l l l modules: l TSX AEY 800 and TSX AEY 1600 (See Calibration of the TSX AEY 800 and TSX

AEY 1600 modules, p. 31)

TSX AEY 810 (See

Calibrating the TSX AEY 810 module, p. 42)

TSX AEY 1614 (See

TSX AEY 414 (See

TBX AES 400 (See

TBX AMS 620 (See

Calibrating the TSX AEY 1614 module, p. 53)

Calibration, p. 67)

Calibrating the TBX AES 400 module, p. 101)

Calibrating the TBX AMS 600 module, p. 115)

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