I/O Module Failed Factory Test

What does E4-16172 mean?

An I/O bus module has been identified as not having passed its factory tests. This indicates a manufacturing defect or pre-existing hardware fault, which could lead to unreliable operation, premature failure, or incorrect functionality. This module is likely faulty out of the box.

• Intrinsic manufacturing defect in the I/O module's components (e.g., faulty IC, cold solder joint).
• Damage to the module during shipping, handling, or installation after factory testing.
• Degradation of internal components due to latent defects or exposure to harsh environmental conditions.
• Corrupted EEPROM containing factory test results or calibration data, leading to an incorrect status report.
• Software bug in the system controller incorrectly interpreting the module's factory test status.

Click steps to track your progress.

1. 1

   1. Verify the module's serial number and production batch against any manufacturer recalls or known issue bulletins.

2. 2

   2. Access the PLC's diagnostic buffer for any specific test failure codes reported by the module.

3. 3

   3. Attempt to re-initialize the I/O module via the PLC software configuration (e.g., by toggling Parameter P_MOD_INIT).

4. 4

   4. Confirm the module is running the latest compatible firmware version recommended by the manufacturer.

5. 5

   5. Replace the I/O module with a new, known good unit, as this fault typically indicates an irreparable defect.