6 (Argument: 5)

Process Image Size Exceeded

Wago · PFC200 PLC

What does 6 (Argument: 5) mean?

The maximum permissible size of the process image has been exceeded. This indicates that the combined data requirements of the connected I/O modules are too large for the controller's process image memory, preventing proper data exchange between the controller and I/O modules.

Common Causes

  • Too many I/O modules connected, or modules with large data footprints, exceeding the controller's process image memory limits.
  • Incorrect configuration of I/O modules leading to an oversized process image.
  • Attempting to map an excessive number of input/output bits into the controller's process image.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Switch off the power supply to the controller.

  2. 2

    Reduce the number of I/O modules connected to decrease the process image size.

  3. 3

    Switch the power supply back on to the controller.

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Verified technical data. Last updated: March 2026

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