Diagnostic

Overview

In online mode, the Status tab of the bus coupler provides monitoring and diagnostics information for the bus coupler and connected modules.

Displaying Diagnostic Information

Bus coupler and expansion module status information is displayed under the Status tab of the bus coupler in EcoStruxure Machine Expert.

For more information, refer to Status tabs description.

Status LEDs

The following graphic shows the LEDs of TM3 Modbus Serial Line bus coupler:

The following table describes the status LEDs:

LED

Color

Status

Description

PWR

Green

On

Power is applied.

Off

Power is removed. All LED indicators are off.

COM

Green

Flashing

Data sending and receiving.

Off

No data exchanged.

Red

Flashing

Device is receiving an incorrect data frame.

ERR

Red

Flashing

Device has detected an error that is, under most circumstances, recoverable. For example:

  • Rotary switch position changed during operational mode. Return to the initial position to reset the LED behavior.

  • Error detected during firmware update.

  • Communication and configuration errors.

Off

No error detected.

I/O

Green

Flashing

Device has received and applied the expansion modules configuration.

On

Device is communicating with the expansion modules.

Green

Red

Flashing

On

The physical configuration is inconsistent with the software configuration. No data exchange (status and I/O) is occurring.

Green

Red

On

On

The physical configuration is inconsistent with the software configuration. I/O data is not applied.

Green

Red

On

Flashing

At least one TM2 or TM3 expansion module did not respond to the bus coupler for 10 consecutive cycles.

Off

No configuration. Device is not communicating with the expansion modules.

NOTE: With the exception of the PWR LED, each LED is ON for a few seconds, then OFF during boot sequence. The LED behavior rules apply when the boot is completed successfully.

Serial Line Bus Coupler Status Diagnostics

The following table provides detailed information regarding the bus coupler status, expansion module status as well as communication statistics:

Register

Function

Bit

Description

900

Bus and modules status

0…8

Reserved

9

Communication error or external error

10…12

Reserved

13

Expansion modules missing or incorrectly configured

14…15

Reserved

901

Expansions error

0

Module 1 error

1

Module 2 error

2

Module 3 error

3

Module 4 error

4

Module 5 error

5

Module 6 error

6

Module 7 error

7

Module 8 error

8

Module 9 error

9

Module 10 error

10

Module 11 error

11

Module 12 error

12

Module 13 error

13

Module 14 error

14…15

Reserved

902 - 929

Reserved

-

Reserved

930

TM3/TM2 bus and modules status

0…1 Module 1

Module status (2 bits per module):

  • 0 hex: Module OK

  • 1 hex: Module configuration error detected

  • 2 hex: Module runtime error detected

  • 3 hex: Module not present but it is optional module

2…3 Module 2

4…5 Module 3

6…7 Module 4

8…9 Module 5

10…11 Module 6

12…13 Module 7

14…15 Module 8

931

TM3/TM2 bus and modules status

0…1 Module 9

Module status (2 bits per module):

  • 0 hex: Module OK

  • 1 hex: Module configuration error detected

  • 2 hex: Module runtime error detected

  • 3 hex: Module not present but it is optional module

2…3 Module 10

4…5 Module 11

6…7 Module 12

8…9 Module 13

10…11 Module 14

12…13

Reserved

14…15

Bus status:

  • 0 hex: Bus OK

  • 1 hex: Bus configuration error detected

  • 2 hex: Bus runtime error detected

  • 3 hex: Bus not configured

932

System State

–

  • 0 hex: System is booting.

  • 1 hex: TM3 bus is not configured.

  • 2 hex: A TM3 configuration is being transferred.

  • 3 hex: A valid TM3 configuration has been applied successfully.

  • 4 hex: TM3 bus is controlled by Modbus SL IOScanner.

  • 5 hex: TM3 bus is controlled by Web server.

  • 6 hex: Timeout on fieldbus refresh

  • 7 hex: Firmware update in progress

  • 9 hex: System state transition in progress.

933

TM3/TM2 bus configuration

–

  • Bits [0]: Modbus Serial Data consistency

  • 0 hex: Disable

  • 1 hex: Enable

NOTE: When Modbus TCP is enabled, the values of the status registers (900...901, 930...932) reflect the state of the TM3 Bus Coupler and connected TM3 Expansion modules. Read these status registers before starting IO exchange and take any appropriate actions that might be necessary.

Serial Line Bus Coupler Communication Diagnostics

The following table provides information regarding the registers for communication management:

Register

Function

Description

990

Not used

–

991

Number of received messages

Number of messages received

992

Number of sent messages

Number of messages sent

993

Number of non-valid messages

Number of corrupted messages (format error in the request, invalid action or CRC)