Omron DeviceNet CV Series Operation Manual page 250

C200H I/O Link Units
Indicators
Indi- Color Status
cator
MS Green ON Device Operational
Flashing Device in Standby
Red ON Unrecoverable Fault
Flashing Minor Fault
--- OFF No Power
NS Green ON Link OK.
On-line, Connected.
Flashing On-line, Not Connected
Red ON Critical Link Failure
Flashing Connection Time-out
--- OFF Not Powered/
Not On-Line
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The indicators display the status of the C200H I/O Link Unit and the Network.
When the Network is operating normally, the 7-segment display shows the
C200H I/O Link Unit's node address; when an error has occurred, it shows an
error code and the faulty node's node address.
Definition
Normal operating status.
Reading switch settings.
Unit hardware error: Watchdog timer error.
Switch settings incorrect, etc.
CPU Unit error, power isn't being supplied, waiting for initial pro-
cessing to start, or the Unit is being reset.
Network is operating normally (communications established)
Network is operating normally, but communications have not yet
been established.
A fatal communications error has occurred. Network communica-
tions are not possible. Check for a node address duplication or Bus
Off error.
Communications timeout.
Checking for node address duplication on the Master, switch set-
tings are incorrect, or the power supply is OFF.
Seven-Segment Display
In addition to the MS and NS indicators, a C200H I/O Link Unit has a 2-digit,
7-segment display that normally displays the C200H I/O Link Unit's node
address. When an error occurs, the display will alternate between the error
code and the node address of the faulty Slave. The dots at the lower-right of
each digit indicate the Read/Write Area setting status (default/user settings).
Normal: C200H I/O Link Unit's node address
Error: Error code and C200H I/O Link Unit's node address
Read/Write Area: Default/user settings
Status
Error Watchdog timer
Memory or system
error
Other errors
Meaning
Display
Not lit
Error code only Lit
Error code and error node address alternate
(see diagram below)
Section 6-1
233