Troubleshooting
27 / 32
on.
3
PLC-S
PLC-S module
failure
Contact the supplier to
replace the PLC-S module
Table 6-2 Troubleshooting of communication faults
Data collection failures
TX light and RX light in the AC-PLC system will flash functionally during the data
collection process. RX light flashes when the PLC-M module receives the data
collection command from the data collector; and TX light flashes when the PLC-M
module sends data to the data collector. RX light flashes when the PLC-S module
receives the data sent by the inverter, and the TX light flashes when the PLC-S module
sends data to the inverter. The following are typical manifestations of data collection
failures and their handling methods.
No.
Module
Test methods
Causes
Measures
1
PLC-M
TX
or
RX
indicator
flashes or not
The
data
collector does
not send the
acquisition
command
Check if data collection is
normal
2
PLC-M
RS485
connection
failure
Check whether the RS485
communication
cables
between
the
data
acquisition and the PLC-M
module
are
properly
connected
3
PLC-M
PLC-M
module failure
Contact the supplier to
replace the PLC-M module
4
PLC-S
RS485
connection
failure
Check if the PLC-S module
and
the
inverter
are
connected properly
5
PLC-S
PLC-S module
failure
Contact the supplier to
replace the PLC-S module
Table 6-3 Troubleshooting of data collection faults
