We are building up a new application to replace an older SCADA system. We don't want both systems polling the end devices so VT's port tags are all disabled until we are ready to commission.
However, the modbus devices are still getting polled somehow. We see poll failures where there should be zero activity. When failing over to the backup server, we saw tens of thousands of polls attempted without our intervention or control. On a disabled port.
Has anyone else seen this behaviour? Its a very concerning behaviour and it might consistently crater our 600+ modbus device system. We had been using 12.1.23 and just upgraded to 12.1.27.