GE IC695CPE400 Programmable Automation Controller

Known Issues and Anomalies – CPE305 / CPE310 and Related Modules

1. Serial I/O Half Duplex Mode – Low Baud Rates

• Condition: Serial I/O protocol, 2-wire half-duplex mode, baud < 19.2 kbaud

• Issue: Last transmitted character may appear as the first character in the receive buffer when switching from TX to RX.

• Impact: Possible corrupted first character in received messages.

• Workaround: Use baud rates ≥ 19.2 kbaud if possible.

2. Rare Power-Up Problem

• Condition: Logic & configuration source set to Flash.

• Issue: On rare occasions, controller powers up with all LEDs blinking in unison and becomes unreachable.

• Workaround: Power cycle the controller (off → on).

3. ECM850 Reset (via Pushbutton or SVC_REQ 24)

• Condition: ECM850 reset triggered.

• Issue: CPU does not report Addition of IOC fault message in the Controller fault table after reset.

• Impact: Missing fault log entry (but reset completes successfully).

• Workaround: None required – awareness only.

4. Flash Part Issue (2012 Production Only)

• Condition: CPE305/CPE310 shipped in 2012, with Energy Pack connected.

• Issue: Substandard flash parts caused extended write times, exceeding Energy Pack capacity.

  • Result: User memory not preserved fault after power cycle.

• Status:

  • Affected units: Manufactured/shipped during 2012 only.

  • Units before 2012 or after Jan 1, 2013 are not affected.

• Resolution: Replace affected 2012 units via warranty return.

5. Ethernet COMMREQs on First Logic Sweep

• Condition: Large user logic; COMMREQ issued on first logic sweep.

• Issue: COMMREQ may be aborted before transmission, especially from embedded Ethernet port.

• Workaround: Avoid issuing COMMREQs on the first logic sweep.

6. PMM335 Loss Detected on CPU Power Down

• Condition: CPU powering down with PMM335 (PACMotion controller) connected.

• Issue: CPU may log Loss of PMM335 module just before shutdown.

• Impact: False loss indication; module is present again on power-up.

• Workaround: None required.

• Verification:

  1. Check timestamp in Loss of Module report – aligns with power-down event.

  2. PME “Show Status Details” – confirms PMM335 is present after power

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