3.2.3 Indicators
The communication module is provided with LEDs that indicate the communication and power supply
status.
Cyclic communication indicator
(Top: Red, Bottom: Green)
Communication module POW
ON indicator (Green)
Display item
During cyclic communication
Cyclic communication
indicator
While cyclic communication is stopped
(Red/Green)
At disconnection of communication cable
or communication error during cyclic
communication
While voltage is applied to the receiving
POW ON indicator
terminal
While power supply is not connected to
(Green)
the receiving terminal or current is cut off
by poly switch
C
C
Figure 3.2-2 Indicator LED positions
Status
Table 3.2-2 LED indicators
43
Indicator
When communication
module is followed by
P, W, or C module
Green ON (Red OFF)
Red ON
(Green OFF)
Red ON (Green OFF)
Green ON
OFF
Except the left
configuration
OFF