Problems with communication with I/O units
Maintenance/Troubleshooting
1-74
Do the internal terminals of the GP operate properly?
You need to prepare a loopback cable to check the internal terminals. Prepare the loopback cable
according to the following instructions.
Preparing the loopback cable
The wiring of the loopback cable is as follows:
• Sink type
• Source type
Continued
A1
B1
A2
B2
A3
B3
A4
B4
A5
B5
A6
B6
0V
24V
OUT1
OUT0
NC
COM
IN5
IN4
IN3
IN2
IN1
IN0
Example: To check three terminals at a time, from OUT0 to IN0 through IN2, and from OUT1
to IN3 through IN5
A1
B1
A2
B2
A3
B3
A4
B4
A5
B5
A6
B6
0V
24V
OUT1
OUT0
NC
COM
IN5
IN4
IN3
IN2
IN1
IN0
Example: To check three terminals at a time, from OUT0 to IN0 through IN2, and from OUT1
to IN3 through IN5