Omron CJ1W-DRM21 Operation Manual page 70

2 Nomenclature and Installation
Seven-Segment Indicator
In addition to the MS and NS indicators, DeviceNet Units have a 2-digit, 7-segment indicator that nor-
mally indicates the master node address. When an error occurs, the indicator will alternately show
between the error code and the node address of the faulty slave.
There are dot indicators at the lower-right corner of each digit. The left dot indicator shows whether or
not the master is operating and whether the scan list is enabled or disabled. The right dot indicator
shows whether or not the slave is operating.
Normal: Master Unit's node address
Error: Error code and faulty node address
Indicates whether the master is operating or stopped and
whether the scan list is enabled or disabled.
Seven-segment Digits
Remote I/O communications active and
normal
From power ON to completion of node
address check (master function disabled,
slave function disabled, or both disabled)
Remote I/O communications started
From completion of the node address
check until the start of remote I/O com-
munications
Error
Scan list
2-4
Indicates whether the slave is operating or stopped.
Status
Displays the mas-
ter's node address
(00 to 63)
Watchdog timer Not lit
error
Memory error or Error code only
Controller error
Other errors Alternately displays the error code and
error node address (see diagram below)
Reading "- -"
Registered
CJ-series DeviceNet Units Operation Manual for NJ-series CPU Unit(W497)
Display
Lit
Flashing
Flashing (until
communications
actually start)
Flashing
Lit
Flashing