Pro-face RHAA033: Error responded for initial communication command

Pro-face HMI Major Communication

Model: GP4000/SP5000 Series | Code: RHAA033

Applicable Systems
GP4000 Series

Symptoms

  • GP-Pro EX display unit shows error RHAA033: Error responded for initial communication command.

Possible Causes

  • The device/PLC is returning an error code on a communication request from the display unit.

Troubleshooting Steps

  1. Step 1: Check the device/PLC manual for details on the returned error codes.
    Communication restored and error cleared

How to Reset

Repower or reset the display unit after correcting the root cause.

Related Pro-face Fault Codes

Source: Pro-face GP-Pro EX Maintenance/Troubleshooting Manual, T.7.1 Common Display errors (proface.tech/otasuke official)

Category: HMI