Chapter 7 Discrete I/O Slave Unit Specifications
7-5
7.7 Communication
Connector
Table 7.5 Communication connector terminal arrangement
Terminal layout
Number
Signal
Wire color
5
V+ Red
4
CAN_H
White
3
Drain
Bare Wire
2
CAN_L
Blue
5
1
4
3
2
1
V-
Black
7.8 LED
Specification
(1) MS/NS
Table 7.6 MS/NS LED Specification
NS
MS
Lit in Green
Flashing in Green
Lit in Red
Flashing in Red
Turned off
Lit in Green
1
2
4
5
3
Flashing in Red
―
―
―
―
6
Lit in Red
―
―
―
―
7
Turned off
―
―
―
―
8
Table 7.7 MS/NS LED detail
No. Display status
Description
Action to take
1
MS lit in green
NS lit in green
I/O connection
established
―
2
MS lit in green
NS flashing in
green
I/O connection not
established
Confirm that the DeviceNet master is working normally.
3
MS lit in green
NS turned off
Checking node
address overlap/no
power supply to the
network
Check the communication speed of each device.
Check that 24 V DC is supplied.
4
MS lit in green
NS lit in red
Node address
overlaps/it is
detected that the bus
is not functioning
Check the node address and communication speed of
each device.
Check to see if a cable is broken.
Check that the terminal resistor is connected properly.
Check that the cable length is within the specification
range.
5
MS lit in green
NS flashing in red
Communication
timeout
Check the communication speed of each device.
Check to see if a cable is broken.
Check that the terminal resistor is connected properly.
Check that the cable length is within the specification
range.
6
MS flashing in red
NS turned off
Illegal switch setting
Check the rotary and DIP switches. Once they are
corrected, turn the power supply on again.
7
MS lit in red
NS turned off
Slave unit failure
WDT error
Turn the power supply off and then on again.
If the error persists, replace the unit.
8
MS turned
off
NS turned
off
No power supply to
the PLC/ waiting for
module initialization
Check that the specified voltage is supplied to the power
module of the PLC.