Docu-No.: 1090020601-EN Rev. 1.2.1 Page 83
Troubleshooting 10
KCM CPU LEDs 10.2
10.2.1 CPU pc board LEDs
Refer to Fig. 10.1 for locations on cpu pcb near location J8.
10.2.2 K-Port LEDs
Refer to Fig. 10.1 for locations on cpu pcb near location J14/J15.
LED Function Notes
Alive CPU is operational If not flashing, CPU has failed or has no dc power
TxD Transmit data on the
internal channel
Data is being sent to the drive pc board on the Internal
data channel. CPU is the channel master.
RxD Receive data on the internal
channel
Data is being received from the drive pc board on the
Internal data channel. CPU is the channel master.
Alarm Alarm function KCM pc board has an alarm condition
LED Function Notes
TxD1 Data transmitting from K-
Port #1
Data is being sent to a KSU-II, KSL or KSC user interface.
If a problem, check K-Port #1 programming.
RxD1
Data received into K-Port #1
Data is received from a KSU-II, KSL or KSC user
interface. If a problem, check K-Port #1 programming.
TxD2 Data transmitting from K-
Port #1
Data is being sent to a KSU-II, Modbus I-O or KSC user
interface. If a problem, check K-Port #2 programming.
RxD2
Data received into K-Port #2
Data is received from a KSU-II, Modbus I-O or KSC user
interface. If a problem, check K-Port #2 programming.
Alive K-Port is active If not flashing, K-Port has failed.
Error Indicates a K-Port error K-Port has an alarm condition
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