Omron DeviceNet CV Series Operation Manual page 330

Troubleshooting
8-2 Troubleshooting
8-2-1 Slave Unit Troubleshooting
Red Indicator
(ON or Flashing)
Error
The MS indicator is a constant red.
The MS indicator is flashing red.
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Seven-segment Display
The 7-segment digits show the C200H I/O Link Unit's node address during
normal operation, but alternate between the error code and the Unit's node
address when an error occurs. The following table outlines the operation of
the display.
Status
Error Watchdog timer
Memory or system
error
Other errors
The following diagram illustrates the alternating display of the error code and
error node address.
OFF (0.3 s)
Error code
(1 s)
OFF (0.3 s)
Node address
If more then one error occurs at the same time, each error code will be dis-
played in sequence, followed at the end by the error node address.
Use the following table to troubleshoot problems in a Slave that has a red indi-
cator that is ON or flashing.
The Slave Unit is faulty. Replace the Unit.
• Check that the Slave's baud rate setting is correct. The setting must
be 125 kbps, 250 kbps, or 500 kbps. Restart the Unit after changing
the baud rate.
• Replace the Unit if the MS indicator continues to flash red even
though the baud rate setting is correct.
Not lit
Error code only
Error code and error node address
alternate (see diagram below)
OFF (0.3 s)
Error code
(1 s)
(1 s)
Probable cause
Section 8-2
Display
Lit
OFF (0.3 s)
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