Omron CJ2M-CPU Series Connection Guide

9
．
Program
50
9.5. Ladder program
9.5.1. Functional Components of the Ladder Program
The functional components of this program are shown below.
Major classification Minor classification Description
1.Initialization
processing
1.1.Response code clear
1.2.Control word setting
for CMND instruction
1.3.Send/receive symbol
setting
The area of use is cleared, and the
initialization setting is performed as a
preparation for communications.
2.CMND
instruction
execution
management
2.1.CMND instruction
executing
2.2.CMND instruction
execution processing
2.3.Normal/error detection
processing
The CMND instruction (Modbus-RTU
communication) is executed.
A normal end or an error end is detected
based on the related flags and receive
data.
3.Normal end state
management
3.1.Normal end
processing
3.2.Response code setting
The normal completion flag is turned ON.
The response code for a normal end is
set.
4.Error end state
management
4.1.Error end processing
4.2.Response code setting
The error end flag is turned ON.
The response code corresponding to the
error cause is set.
9.5.2. Detailed Description of Each Functional Component
The program configured for this document is shown below.
●1.Initialization processing
No. Outline Description
1.1. Response code
clear
Initializes the Error code storage area.

Omron CJ2M-CPU Series Specifications

General

Power Supply	24 VDC
Number of Instructions	Over 400 instructions
Model	CJ2M-CPU11, CJ2M-CPU12, CJ2M-CPU13, CJ2M-CPU14, CJ2M-CPU15
Program Capacity	5K steps to 60K steps
I/O Capacity	Up to 2, 560 points
Communication Ports	Ethernet, USB, RS-232C
Execution Time	0.04 µs per basic instruction
Operating Temperature	0 to 55°C
Position Control	Supported
High-speed Counter	100 kHz max.
Pulse Output	100 kHz max.
Maximum Units	40 units
Storage Temperature	-20 to 75°C
Interrupt Inputs	Supported