EL
ErrorLib
Brands
||
  1. Home
  2. ABB
  3. PB610 Panel Builder 600 Programming Software
  4. 28683
About·Privacy·Terms

ErrorLib — Industrial Fault Code Library

Disclaimer: ErrorLib is an independent technical reference tool. While we aim for accuracy, always verify with the manufacturer’s official service manuals before performing maintenance on industrial equipment. ErrorLib is not affiliated with the brands listed.

28683

F-device Safety Watchdog Time Zero (V3 CPU)

ABB · PB610 Panel Builder 600 Programming Software

What does 28683 mean?

The F-device instance <n> for AC500 V3 non-safety CPU PM56xx is configured with a safety watchdog time value (F_WD_Time) of 0 ms. This indicates an invalid or unconfigured watchdog timer, critical for maintaining safe PROFIsafe communication and preventing the module from going to a safe state.

Common Causes

  • Watchdog timer within the V3 CPU has expired, indicating a system hang or process failure.
  • Software or hardware issue causing the F-device to stop responding.
  • Persistent interrupt or communication deadlock.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Check the Safety PLC configuration for the F-device instance <n>.

  2. 2

    Verify the F_WD_Time parameter is set to a valid non-zero value.

Browse all codes in this manual (58)
Verified technical data. Last updated: April 2026

Related Faults

1Safety Destination Address Not Valid (V2 CPU)10Parameter F_SIL Exceeds Specific Application SIL (V2 CPU)11Safety Watchdog Time Zero (V2 CPU)
Source: ABB PB610 Panel Builder 600 Programming Software
Open Manual (Page 459)Search more codes in this manual