Omron NSJ CONTROLLERS - 03-2008 Operation Manual page 108

Nomenclature and Functions
OFF (0.1 s)
Error code
(1 s)
OFF (0.3 s)
■ Seven-Segment Display
The 7-segment display normally indicates the master node address in deci-
mal between 00 and 63. When an error occurs, the display will alternate
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 the scan list is enabled or disabled. The right dot
indicator shows whether the slave is operating.
Normal: Master's node address
Error:
Indicates whether the master is operating or stopped and
whether the scan list is enabled or disabled.
Seven-segment Display
The following table shows the functions of the 7-segment display.
Status
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
The following diagram shows the alternating error code/ node address display.
OFF (0.3 s)
Faulty slave's
node address
(1 s)
OFF (0.1 s)
Master's node
address (1 s)
If there is an error in the master function.
Error code and faulty node address
Indicates whether the slave is operating or stopped.
Displays the mas-
ter's node address
(00 to 63)
Watchdog timer Not lit
Memory error or Error code only
system error
Other errors Alternately displays the error code and
error node address (see diagram below).
Reading "- -"
Registered
OFF (0.1 s)
Error code
(1 s)
Master's
error code (1 s)
Section 4-1
Display
Lit
Flashing
Flashing (until com-
munications actu-
ally start)
Flashing
Lit
Flashing
OFF (0.3 s)
Faulty slave's
node address
(1 s)
OFF (0.3 s)
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