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CQM1-SRM21-V1 Master Unit for CQM1 PLCs
Section 4-4
I/O Allocation Example (4 Words)
In this example the number of points/node number is set to 8, the PLC word
allocations are set to 4 words, and the system has the configuration shown in
the following diagram. (The node numbers are indicated by #0, #1, and #2.)
The I/O allocations for this system are shown below.
I/O Allocations in 4-point Mode
PLC Word Allocation: 2 Words
The following diagram shows the I/O allocations when the DIP switch is set as
shown below.
Pin 1: OFF
Pin 2: OFF
Pin 3: ON
PLC Word Allocation: 4 Words
The following diagram shows the I/O allocations when the DIP switch is set as
shown below.
CQM1-SRM21-V1
SRT1-
ID04
SRT1-
ID08
#1
#2
#2
#1
#0
SRT1-
ROC16
SRT1-
OD08
SRT1-
ND08S
Terminator
PS: Power Supply Unit
CPU: CPU Unit
IN: Input Unit or CPU Unit inputs
OUT: Output Unit
SRM: Master Unit
4 inputs
8 inputs
16 outputs
8 outputs
4 inputs, 4
outputs
CQM1
PS
CPU
IN 16
SRM
IN 16
OUT 16
OUT 16
Inputs
Bits
Outputs
Bits
Unused bits
IR 000
IR 001
IR 002
IR 003
IR 100
IR 101
IR 102
IR 103
SRT1-
ID04
SRT1-
ND08S
SRT1-ID08
SRT1-OD08
SRT1-
ND08S
SRT1-ROC16
Output Unit
Output Unit
Built-in CPU inputs
Input Unit
Unused bits
Inputs:
First word
Bits
Outputs:
First word
Output Slave 3
Input Slave 3
Input Slave 2
Input Slave 1
Input Slave 0
Output Slave 2
Output Slave 1
Output Slave 0