Omron CVM1-CLK21, Operation Manual

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Troubleshooting Using Indicators Section 9-1
9-1 Troubleshooting Using Indicators
This section describes the errors indicated by the Controller Link Unit indica-
tors and possible remedies.
9-1-1 CS/CJ-series Controller Link Units
Troubleshooting with RUN, ERC, ERH and INS Indicators
The RUN, ERC, ERH, and INS indicators can be used to check whether Con-
troller Link Unit startup and Network participation are operating normally.
Note Be sure to turn off the power to the PC before performing any of the following.
• Disconnecting the Unit or connectors.
• Securing Units or connectors.
• Setting hardware switches.
RUN: Operating
ERC: Communications
error
ERH: PC error
INS: Network participation
LNK: Data link
M/A: Data link mode
TER: Terminating resistance
RUN
ERC
INS
SD
RD
M/A
LNK
P/S
ERH
CS-series Unit
CJ-series Unit
RUN
ERC
INS
SD
RD
M/A
LNK
ERH
CLK21
TER
RUN
CLK21
ERC INS
ERH M/A LNK RD TER
SD
Indicators Probable cause Probable remedy
RUN ERC ERH INS
Lit Not lit Not lit Lit Unit operating normally;
Network participation nor-
mal. ---
Not lit Lit --- --- Controller Link Unit faulty. If the ERC indicators still
lights when the Unit is
mounted on another PC,
replace the Controller Link
Unit.
Reset the node address to
within the 1 to 32 range (for
CS/CJ Series only).
Not lit Not lit Not lit Not lit Power is not being sup-
plied correctly to the PC.
Check the power supply
voltage and supply at the
recommended voltage.
The Controller Link Unit
has become loose. Secure the Controller Link
Unit firmly.
The Controller Link Unit is
mounted in the wrong posi-
tion. Refer to 3-2-3 CS-series
PCs or 3-2-4 CJ-series
PCs and mount the Unit
correctly.
The Controller Link Unit is
faulty. If the indicators do not light
when the Unit is mounted
in another PC, replace the
Controller Link Unit.