Fatek FBs Communication Error Code A

Fatek PLC & VFD Warning Communication

Model: FBs | Code: A

Applicable Systems
FBs-MA FBs-MC FBs-MN B1 HB1

Symptoms

The communication command references a component address that is outside the valid range for the PLC. The request is rejected and error code A (hex) is returned.

Possible Causes

  • Component address exceeds the valid range for the PLC model
  • Incorrect component type prefix (e.g., R for relay vs D for data register)
  • Address calculation error in the master application

Troubleshooting Steps

  1. Step 1: Check the component address in the communication request against the valid address range in the FATEK component reference
    Address is within the valid range for the target component type
  2. Step 2: Verify the component type prefix matches the intended register type
    Component type prefix is correct
  3. Step 3: Correct the address in the master application and resend the request
    PLC responds with error code 0

How to Reset

Correct the component address in the communication request to a valid range and resend.

Related Fatek Fault Codes

Source: FATEK FBs Communication Protocol Manual, Appendix 1

Category: PLC & VFD