Modbus Local Serial Communication Interruption

What does SLF1 mean?

An interruption in Modbus local serial communication. This means the drive has lost communication with its Modbus master or other devices on the local serial network, preventing remote control, monitoring, or data exchange. This can lead to a loss of process control.

Additional Steps

Steps 1–2 are listed in Priority Fix.

1. 3

   Ensure Modbus communication parameters (baud rate, address, parity) match on all devices on the network.

2. 4

   Inspect the drive's Modbus port for any physical damage or loose connections.