Omron E5ZE-8 Communications Manual page 42

Indicators
Indicator Status and Meaning
Indicator status
MS NS
ON ON Remote I/O or message commu-
(green) (green) nications in progress
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)
38
Network status
Refer to the DeviceNet (CompoBus/D) Operation Manual (Cat. No. W267) for
details on error processing.
Probable cause and remedy
E5ZE is communicating normally.
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 DeviceNet switch settings.
Check the settings and restart the Slave.
The same Slave Unit 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 items and restart the Slave Unit.
• Does the baud rate of the Master and Slave match?
• Are cable lengths (trunk lines and branch lines) appropriate?
• Are any cables disconnected or loose?
• Is terminating resistance applied to both ends of the trunk lines
and nowhere else?
• Is there excessive noise?
The connection with the Master Unit timed out.
A communications time-out error has occurred.
Check the following items and restart the Slave Unit.
• Does the baud rate of the Master and Slave match?
• Are cable lengths (trunk lines and branch lines) appropriate?
• Are any cables disconnected or loose?
• Is terminating resistance applied to both ends of the trunk lines
and nowhere else?
• Is there excessive noise?
Section 5-2