Omron DeviceNet CV Series Operation Manual page 329

Indicators and Error Processing
8-1 Indicators and Error Processing
8-1-1 Errors Occurring in the Slave Unit
Display/Indicator
status
MS NS
ON ON Remote I/O or message commu-
(green) (green) nications in progress (normal
status)
ON OFF Checking for node address dupli-
(green) cation
ON Flashing Waiting for connection
(green) (green)
ON (red) OFF Watchdog timer error
Flashing OFF Incorrect switch settings
(red)
ON ON Node address duplication
(green) (red)
ON ON Bus Off error detected
(green) (red)
ON Flashing Communications timeout
(green) (red)
8-1-2 C200H I/O Link Unit Seven-segment Display
312
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The following table lists probable causes and remedies for errors that occur in
the Slave Unit.
Network status
Remote I/O communications and/or message communications
are active on the Network.
Checking whether the Unit's node address has been set on
another node.
The Unit is waiting for a connection from the Master Unit.
A watchdog timer error occurred in the Unit. Replace the Unit.
A mistake has been made in the switch settings. Check the set-
tings and restart the Slave.
The Slave Unit's node address has been set on another node.
Change the settings to eliminate the duplication and restart the
Slave.
The communications controller detected a Bus Off status and
communications have been stopped.
Check the following and restart the Slave: Master/Slave baud
rates, for loose or broken cables, for noise, cable lengths, and
Terminating Resistors.
The connection with the Master Unit timed out.
Check the following and restart the Slave: Master/Slave baud
rates, for loose or broken cables, for noise, cable lengths, and
Terminating Resistors.
C200H I/O Link Units have a 2-digit, 7-segment display that normally indi-
cates the C200H I/O Link Unit's node address (decimal value from 00 to 63).
When an error occurs, the display will alternate between the error code and
the node address of the faulty C200H I/O Link Unit. If more than one error
occurs at the same time, the error codes will be displayed in sequence, fol-
lowed at the end by the faulty Unit's node address.
Normal: C200H I/O Link Unit node address
Error: Error code and faulty C200H I/O Link Unit's node address
Read/Write Area default/user settings
Dot Indicators
The dots at the lower-right of each digit are operated by bit 13 (Read/Write
Area default setting) of the Status Area (first word of the IR Area + 5 words),
and show whether user settings or default settings are being used for the
Read/Write Area. The dots are lit when the default settings are used and not
lit when the user settings are used.
Probable cause and remedy
Section 8-1