A
I'm having an intermittent MCC DeviceNet communication fault on Power Flex VFD and on SMC Flex Soft Starter. this intermittent fault comes up only on the 2 devices among the network. I proceed to test the network voltage:
The power is ok
the HI signal is ok
the low signal is ok
the DeviceNet cable originally as per the design is not shielded. the drive is well grounded, the soft starter is well grounded.
the terminator resistors I did not check because the system is online.
If I disconnect the resistors for checking, is that interfere the communication.
Please help.
The power is ok
the HI signal is ok
the low signal is ok
the DeviceNet cable originally as per the design is not shielded. the drive is well grounded, the soft starter is well grounded.
the terminator resistors I did not check because the system is online.
If I disconnect the resistors for checking, is that interfere the communication.
Please help.