ABB · ACH580

EFB 6681: loss of communication

From the hexadecimal code to the ordered master control, line EIA-485 and group 58, keeping the data of the network.

Verified field

ACH580 · embedded fieldbus EIA-485 · configuration BACnet MS/TP or Modbus RTU

SEQUENZA DI LETTURA

Controls in order

It records 6681, master status, active protocol and exact moment of loss of communication.
Check the master and then continuity, polarity, shielding and termination to the clamps X5 29, 30 and 31 according to the scheme.
Save address, baud rate, parity and parameters of group 58 before changing configuration.
Compare 58.14 Communication loss action with the project's response and test recovery under surveillance.

♪ 3AXD50000027537 Rev J · 23/02/2026 · control 2026-10-22

Location: Fault tracing · code 6681 EFB comm · loss page 271

ABB · ACH580

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ABB · ACH580

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