Method for reading module status via program variables in Solidot remote I/O module XB6S PROFINET coupler

Siemens TIA Portal provides DeviceStates and ModuleStates instructions for diagnosing remote I/O module status. This article uses a Siemens 1212C V4.5 PLC communicating with Solidot's PROFINET coupler XB6S-PN2002 as an example.

After creating a program and establishing communication with the XB6S-PN2002 coupler, preparations are complete.

I. Reading Coupler Status via DeviceStates XB6S-PN2002的状态

1.Create a global DB and define a Device array to monitor module status.

2.Call the function block and add the array:

• Set LADDR to the target PROFINET system.

• Set MODE=2.

• Link the Device array to STATE.

3.Test: Download the program and monitor the Device array.

If device 1 loses communication, Device[1] returns TRUE.

II. Reading Coupler/Submodule Status via ModuleStates

1.Create a global DB and define a Module array.

2.Call the function block:

• Set LADDR to the coupler (e.g., "pnio").

• Set MODE=5.

• Link the Module array to STATE.

3.Test: Monitor the Module array for status (e.g., maintenance alerts).

Example

For a system with 5 modules (slots 1-5):

• Slot 1 & 3 trigger maintenance alerts → STATE bits:
  Bit 0=1 (fault), Bit 2=1 (slot1 alert), Bit 4=1 (slot3 alert)

This demonstrates Solidot remote I/O module XB6S PROFINET coupler status monitoring via program variables.