MODBUS Interface
F-24 Verbatim Owner's Manual
700 device has not been opened
705 DUART not present
710 net not configured with PLC-type protocol
715 bad serial io configuration parameter
725 background noise on network substrate
730 another modbus master already active
731 mbplus peer in monitor-on-line state
732 mbplus peer never getting token
735 diagnostic loopback test failed
750 a remote node has same node address
755 could not find any nodes on network
1540 NAK count limit exceeded for transmit msg
1541 ENQ count limit exceeded for transmit msg
1561 timeout waiting for response to command
2278 RAM allocation failed
2279 hardware failed self-test at warmstart
2280 cannot access net hardware