A
compressor panel is doted by a serial link between the PLC Allen Bradley Flex IO Prosoft MVI94-MCM module and the VFD panel, the UCP and VFD have separate power supply and the UCP panel has a 24VDC float.
I'm experiencing a problem of floating on the power supply 24VDC on all the UCP by -6VDC every one second, when I disconnect the modbus link to VFD the 24VDC becomes stable and when we put pack the modbus the power starts floating again from 24VDC to 18VDC.
Can you please advise us what we can do to solve this problem.
Here you are the master port configuration:<pre>
[Modbus Master]
# Settings required for Master Driver
Command Count: 2 #Command list count for port
Minimum Command Delay: 1000 #mSec delay between commands
Command Error Pointer: 90 #Internal database location of cmd err list data
Response Timeout:1000 #mSec for response timeout of command
Retry Count: 3 #retry count for failed requests
Error Delay Count: 10 #0-65535 delay for slave after comm error</pre>
I'm experiencing a problem of floating on the power supply 24VDC on all the UCP by -6VDC every one second, when I disconnect the modbus link to VFD the 24VDC becomes stable and when we put pack the modbus the power starts floating again from 24VDC to 18VDC.
Can you please advise us what we can do to solve this problem.
Here you are the master port configuration:<pre>
[Modbus Master]
# Settings required for Master Driver
Command Count: 2 #Command list count for port
Minimum Command Delay: 1000 #mSec delay between commands
Command Error Pointer: 90 #Internal database location of cmd err list data
Response Timeout:1000 #mSec for response timeout of command
Retry Count: 3 #retry count for failed requests
Error Delay Count: 10 #0-65535 delay for slave after comm error</pre>