Assignment Of 1/0 Channel And Relay Numbers; 1/0 Channel Assignment; Relay Assignment - Omron SYSMAC C Series User Manual

Appendix D
Assignment of I/O channel and
relay numbers
1/0 channel assignment
Relay assignment
The input channel of the CPU is fixed at channel 00 while the output
channel is fixed at channel 05.
When an expansion I/O unit, I/O link unit, or both are connected to the
CPU, the I/O channel of the connected units are automatically assigned
and registered in the CPU.
For example, when a 28-point expansion I/O unit is connected, input
channel 01 is automatically assigned to the expansion I/O unit and
registered in the CPU. As the output channel number of the expansion
unit, 06 is automatically assigned and registered.
The input/output signals (devices) are connected to the input/output
terminals on the CPU. Because the CPU uses the numbers assigned to
the input/output terminals when executing the program, assignment and
management of the input/output terminal numbers are required and must
be correctly performed.
The numbers assigned to each relay are listed in the following tables. Use
these to keep a record of which relays have been used.