Pro-face RHAA090: Response timed out from external device

Pro-face HMI Major Communication

Model: GP4000/SP5000 Series | Code: RHAA090

Applicable Systems
GP4000 Series

Symptoms

  • GP-Pro EX display unit shows error RHAA090: Response timed out from external device.

Possible Causes

  • Multilink communication surveillance timeout lapsed (60 seconds).

Troubleshooting Steps

  1. Step 1: Verify network.
    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