rQx
Lifetime Supporting Member
Hi!
I communicate with an onboard communications board modbus RTU. I communicate with 5 VFDs (Parker AC10) and each has 4 calls of MB_Master. So 20 in total.
Everything is working fine with no error for 99% of the time, but sometimes I get a errorStatus 80C8 on the MB_master block wich indicates "slave timeout".
I get this error on ONE of my 4 blocks for the slave and then it just keep running the sequence and next time it is OK again. It can run for a couple of hours and then it triggers on another VFD and another block. It seems random to me.
I guess that maybe the comm gets corrupted somehow and respond with an error, is there anything I can set to make this "better". Or has anyone encountered smiliar findings?
I have terminated both ends with 120Ohm resistor
/Tim
I communicate with an onboard communications board modbus RTU. I communicate with 5 VFDs (Parker AC10) and each has 4 calls of MB_Master. So 20 in total.
Everything is working fine with no error for 99% of the time, but sometimes I get a errorStatus 80C8 on the MB_master block wich indicates "slave timeout".
I get this error on ONE of my 4 blocks for the slave and then it just keep running the sequence and next time it is OK again. It can run for a couple of hours and then it triggers on another VFD and another block. It seems random to me.
I guess that maybe the comm gets corrupted somehow and respond with an error, is there anything I can set to make this "better". Or has anyone encountered smiliar findings?
I have terminated both ends with 120Ohm resistor
/Tim