Omron CJ Series Instruction Manual

P652-E1-01
OMRON Corporation
Displacement Sensor
(ZW-7000 series)
CJ Series
General-purpose Serial
Connection Guide
(RS-232C)

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Table of Contents
1. Related Manuals........................................................................................ 1
2. Terms and Definitions............................................................................... 2
3. Precautions................................................................................................ 3
4. Overview .................................................................................................... 4
5. Applicable Devices and Device Configuration ....................................... 5
5.1. Applicable Devices ............................................................................. 5
5.2. Device Configuration .......................................................................... 6
6. Serial Communications Settings ............................................................. 8
6.1. Parameters ........................................................................................ 8
6.2. Cable Wiring ...................................................................................... 9
7. Serial Communications Connection Procedure ................................... 10
7.1. Work Flow ........................................................................................ 10
7.2. Sensor Controller Setup ................................................................... 12
7.3. PLC Setup ........................................................................................ 20
7.4. Serial Communication Status Check ................................................ 39
8. Initialization method................................................................................ 47
8.1. Initializing PLC ................................................................................. 47
8.1. Initializing Sensor Controller ............................................................ 48
9. Program.................................................................................................... 49
9.1. Overview .......................................................................................... 49
9.2. Communications Sequence ............................................................. 54
9.3. Error Detection Processing .............................................................. 56
9.4. Memory Maps .................................................................................. 57
9.5. Ladder Program ............................................................................... 60
9.6. Protocol Macro Data ........................................................................ 66
9.7. Timing Chart ..................................................................................... 75
9.8. Error processing ............................................................................... 76
10. Revision History .................................................................................. 77

1
．
Related Manuals
1
1. Related Manuals
To ensure system safety, make sure to always read and follow the information provided in all
Safety Precautions and Precautions for Safe Use in the manuals for each device which is
used in the system.
Cat. No. Model Manual name
W472 CJ2M-CPU[][]
CJ2H-CPU6[]
CJ2H-CPU6[]-EIP
CJ-series
CJ2 CPU Unit
Hardware USER'S MANUAL
W473 CJ2M-CPU[][]
CJ2H-CPU6[]
CJ2H-CPU6[]-EIP
CJ-series
CJ2 CPU Unit
Software USER'S MANUAL
W336 CJ1W-SCU[]1-V1
CJ1W-SCU[]2
CJ Series
Serial Communications Units
OPERATION MANUAL
W474 CJ2[]-CPU[][] CJ Series
Programmable Controllers
INSTRUCTIONS REFERENCE MANUAL
W446 CXONE-AL[][]C-V4
/ AL[][]D-V4
CX-Programmer
OPERATION MANUAL
W344 CXONE-AL[][]C-V4
/ AL[][]D-V4
CX-Protocol
OPERATION MANUAL
Z362 ZW-7000[] Displacement Sensor ZW-7000 series
Confocal Fiber Type
Displacement Sensor User’s Manual
Z363 ZW-7000[] Displacement Sensor ZW-7000 series
Confocal Fiber Type Displacement Sensor
User’s Manual for Communications
Settings

2
．
Terms and Definitions
2
2. Terms and Definitions
Term Explanation and Definition
Protocol macro A protocol macro is a function that enables data to be sent and received
with general-purpose external devices.
This function can be realised by executing the protocol macro instruction
(hereinafter referred to as PMCR instruction) in a CPU Unit's user program
through storing procedures for sending and receiving data (protocols) in a
Serial Communications Board or a Serial Communications Unit to
exchange data with general-purpose external devices.
Protocol A unit of independent communication processing with a specific
general-purpose device. A protocol includes procedures for sending and
receiving data. A protocol consists of more than one sequence.
Sequence A unit of the independent communication processing which can be started
by executing the PMCR instruction in a program. A sequence that is started
by the instruction executes steps registered in its own sequence.
Step A unit to execute any one of the followings: message send processing,
message receive processing, message send/receive processing, receive
buffer clear, or step wait. Up to 15 steps can be set for per sequence.
Send message A communication frame (command) to send to general-purpose external
devices. A send message is invoked by steps in the sequence and is sent
to general-purpose external devices.
Receive message A communication frame (response) received from general-purpose
external devices. A receive message is invoked by steps in the sequence
and is compared with data received from general-purpose external
devices.
Receive matrix A function to register and use some communication frames (responses)
when more than one communication frame is expected to be received from
general-purpose external devices. The receive processing can be
executed according to registered communication frames by using this
function.

3
．
Precautions
3
3. Precautions
(1) Understand the specifications of devices which are used in the system. Allow some
margin for ratings and performance. Provide safety measures, such as installing a safety
circuit, in order to ensure safety and minimize the risk of abnormal occurrence.
(2) To ensure system safety, make sure to always read and follow the information provided in
all Safety Precautions and Precautions for Safe Use in the manuals for each device
which is used in the system.
(3) The user is encouraged to confirm the standards and regulations that the system must
conform to.
(4) It is prohibited to copy, to reproduce, and to distribute a part or the whole of this
document without the permission of OMRON Corporation.
(5) The information contained in this document is current as of June 2016. It is subject to
change for improvement without notice.
The following notations are used in this document.
Indicates a potentially hazardous situation which, if not avoided,
may result in minor or moderate injury or property damage.
Point on safety
Precautions on what to do and what not to do to ensure safe usage of the product.
Precautions for Correct Use
Precautions on what to do and what not to do to ensure proper operation and performance.
Additional Information
Additional information to read as required.
This information is provided to increase understanding or make operation easier.
Symbol
The triangle symbol indicates precautions (including warnings).
The specific operation is shown in the triangle and explained in the text.
This example indicates a general precaution.
The filled circle symbol indicates operations that you must do.
The specific operation is shown in the circle and explained in the text.
This example shows a general precaution for something that you must do.

4
．
Overview
4
4. Overview
This document describes the procedures for connecting Displacement Sensor (hereinafter
referred to as Sensor Controller) to CJ-series Programmable Controller + Serial
Communications Unit (hereinafter referred to as PLC) using serial communications, both
produced by OMRON Corporation (hereinafter referred to as OMRON), and for checking their
connections.
Refer to Section 6. Serial Communications Settings and Section 7. Serial Communications
Connection Procedure to understand setting methods and key points to send / receive
messages using the serial communications.
The ladder program in a prepared CX-Programmer project file and the protocol macro data in
a prepared CX-Protocol project file are used to check the serial connection by sending or
receiving a message of ''version information acquisition'' to/from Sensor Controller.
■ Sending /receiving the ''version information acquisition'' message
PLC
Serial communications
(RS-232C)
Sensor Controller
Sending the command data Executing the command
Receiving the response data
and storing in memory Returning the response data
Prepare latest project files of both CX-Programmer and CX-Protocol beforehand.
To obtain a project file, contact your OMRON representative.
Name File name Version
CX-Programmer project file
(extension: cxp)
P652_CJ_PMCR232C_OMRON_ZW-7000_
EV100.cxp
Ver.1.00
CX-Protocol project file
(extension: psw)
P652_CJ_PMCR232C_OMRON_ZW-7000_
EV100.psw
Ver.1.00
This document aims to explain wiring methods and communications settings
necessary to connect corresponding devices and to provide setting procedures.
The program used in this document is designed to check if the connections are
properly established, and is not designed to be constantly used at a site.
Therefore, functionalities and performances are not sufficiently taken into
consideration.
When you construct an actual system, please use the wiring methods,
communications settings and setting procedures described in this document as
a reference and design a new program according to your application needs. .
Command data
Response data

5
．
Applicable Devices and Device Configuration
5
5. Applicable Devices and Device Configuration
5.1. Applicable Devices
The applicable devices are as follows:
Manufacturer Name Model
OMRON
CJ2 CPU Unit
CJ2[]-CPU[][]
OMRON
Serial Communications Unit
CJ1W-SCU[]1-V1
CJ1W-SCU[]2
OMRON
Confocal Fiber Type displacement sensor
Sensor Controller
Sensor Head
ZW-7000[]
ZW-S70[][]
Precautions for Correct Use
In this document, the devices with models and versions listed in 5.2. Device Configuration are
used as examples of applicable devices to describe the procedures for connecting the
devices and checking their connections.
You cannot use devices with versions lower than the versions listed in 5.2.
To use the above devices with models not listed in 5.2. or versions higher than those listed in
5.2., check the differences in the specifications by referring to the manuals before operating
the devices.
Additional Information
This document describes the procedures for establishing the network connections.
It does not provide information on operation, installation, wiring method, device functionality,
or device operation, which is not related to the connection procedures. Refer to the manuals
or contact your OMRON representative.

5
．
Applicable Devices and Device Configuration
6
5.2. Device Configuration
The hardware components to reproduce the connection procedures in this document are as
follows:
Manufacturer Name Model Version
OMRON
Serial Communications Unit
CJ1W-SCU42
Ver.2.0
OMRON
CPU Unit
CJ2M-CPU12
Ver.2.0
OMRON
Power Supply Unit
CJ1W-PA202
OMRON
CX-One
CXONE-AL[][]C-V4
/AL[][]D-V4
Ver.4.[][]
OMRON
CX-Programmer
(Included in CX-One)
Ver.9.60
OMRON
CX-Protocol
(Included in CX-One)
Ver.1.99
OMRON
CX-Programmer project file
(Ladder program)
P652_CJ_PMCR232C_OMR
ON_ZW-7000_EV100.cxp
Ver.1.00
OMRON
CX-Protocol project file
(Protocol macro data)
P652_CJ_PMCR232C_OMR
ON_ZW-7000_EV100.psw
Ver.1.00
-
Personal computer (OS: Windows 7)
-
-
USB cable
(USB 2.0 type B connector)
-
OMRON
RS-232C cable
(for PLC or programmable terminal)
ZW-XPT2
OMRON
Sensor Controller
ZW-7000
Ver.2.020
OMRON
Sensor Head
ZW-S7030
OMRON
Calibration ROM
(supplied with Sensor Head)
OMRON
24 VDC power supply (for Sensor
Controller) (DC24V 2.5A 60W）
S8VS-06024
Precautions for Correct Use
Prepare latest project files of both CX-Programmer and CX-Protocol beforehand.
To obtain a project file, contact your OMRON representative.
24 VDC power supply
(for Sensor Controller)
RS-232C cable (for PLC or
programmable terminal)
CJ2M-CPU12
CJ1W-SCU42
Personal computer
(CX-One installed,
OS: Windows 7)
USB cable Calibration ROM
ZW-7000
ZW-S7030

5
．
Applicable Devices and Device Configuration
7
Precautions for Correct Use
Update CX-Programmer and CX-Protocol to the version specified in this Clause 5.2. or to a
higher version. If you use a version higher than the one specified, the procedures and related
screenshots described in Section 7. and subsequent sections may not be applicable.
In that case, use the equivalent procedures described in this document by referring to the
CX-Programmer OPERATION MANUAL (Cat. No. W446) and the CX-Protocol OPERATION
MANUAL (Cat. No. W344).
Additional Information
For information on the serial cable (RS-232C), refer to 3-4 RS-232C and RS-422A/485
Wiring of the CJ Series Serial Communications Units OPERATION MANUAL (Cat. No.
W336).
Additional Information
For specifications of 24 VDC power supply available for Sensor Controller, refer to the
Displacement Sensor ZW-7000 series Confocal Fiber Type Displacement Sensor User’s
Manual (Cat. No. Z362).
Additional Information
The system configuration in this document uses USB for the connection between Personal
computer and PLC. For information on how to install the USB driver, refer to A-5 Installing the
USB Driver in Appendices of the CJ-series CJ2 CPU Unit Hardware USER'S MANUAL (Cat.
No. W472).

6
．
Serial Communications Settings
8
6. Serial Communications Settings
This section describes the contents of parameter settings and wiring that are all defined in this
document.
6.1. Parameters
The parameters required for connecting PLC and Sensor Controller using the serial
communications are shown below.
Item PLC
(Serial Communications Unit)
Sensor Controller
Unit number
0
-
Communications port
(Communications type)
Port 2 (RS-232C) RS-232C (Default)
Serial communications mode Protocol macro -
Data length (bit) 8 bits 8bit (Default)
Stop bits (length) 1 bit 1bit (Default)
Parity None OFF (None: Default)
Baud rate
38400 bps
38400 (bps) (Default)
Protocol macro transmission method
(Full-duplex / Half-duplex) Full-duplex Full-duplex communications (Fixed)
CS/RS control - OFF (Default)
Terminator - CR（Default）
Precautions for Correct Use
This document describes the setting procedures of CJ1W-SCU42 Serial Communications
Unit with the unit number 0 and communications (connection) port 2.
To connect devices under different conditions, change the CIO area and the control words of
PMCR instruction used in the program. Refer to Section 9. Program for details.

6
．
Serial Communications Settings
9
6.2. Cable Wiring
For details on cable wiring, refer to SECTION 3 Installation and Wiring of the CJ Series Serial
Communications Units OPERATION MANUAL (Cat. No. W336).
Check connector configuration and pin assignments before wiring.
■Connector configuration and pin assignments
CJ1W-SCU42 Serial Communications Unit applicable connector: D-sub 9-pin female
Pin No.
Symbol
Signal name
Input/Output
1
FG
Shield
-
2
SD
Send data
Output
3
RD
Receive data
Input
4
RS
Request to send
Output
5
CS
Clear to send
Input
6
5V
Power supply
-
7
DR
Data set ready
Input
8
ER
Data terminal ready
Output
9
SG
Signal ground
-
Shell
FG
Shield
-
Sensor Controller (ZW-7000) applicable connector: Square 17-pin female
Usage Pin No.
Terminal
name
Function
RS-232C
1
GND(0V)
Signal ground
2
TXD(SD)
Send data
3
RXD(RD)
Receive data
4
RTS(RS)
Request to send
5
CTS(CS)
Clear to send
6 to 17
NC
(Not used)
Shell
FG
Shield
■Cable/Pin assignments (RS-232C cable for connecting to PLC: ZW-XPT2)
Serial Communications Unit
(CJ1W-SCU42)
Sensor Controller
(ZW-7000
）
RS-232C
Interface
Signal
name
Pin No.
Pin No.
Signal
name
RS-232C
Interface
FG
1
1
GND(0V)
SD
2
2
TXD(SD)
RD
3
3
RXD(RD)
RS
4
4
RTS(RS)
CS
5
5
CTS(CS)
5V
6
6 to 17
NC
DR
7
ER
8
SG
9
FG
Shell
Shell
FG
D-sub 9-pin
Connector contact: Male
Square 17-pin
Connector contact: Male

7
．
Serial Communications Connection Procedure
10
7. Serial Communications Connection Procedure
This section describes the procedures for connecting PLC to Sensor Controller using serial
communications. The explanations of procedures for setting up PLC and Sensor Controller
given in this document are based on the factory default settings.
For the initialization, refer to Section 8. Initialization Method.
7.1. Work Flow
Take the following steps to connect PLC to Sensor Controller using serial communications
and to send / receive messages.
7.2. Sensor Controller Setup
Set up Sensor Controller.
↓
7.2.1. Hardware Settings
Connect cables and others to Sensor Controller.
↓
7.2.2. Parameter Settings
Set the parameters for Sensor Controller.
↓
7.3. PLC Setup
Set up PLC.
↓
7.3.1. Hardware Settings
Set the hardware switches on Serial
Communications Unit and connect the cables.
↓
7.3.2. Opening the Project File and
Connecting Online with PLC
Start CX-Programmer, open the project file, and
connect online with PLC.
↓
7.3.3. Creating the I/O Table
Create the I/O table for PLC.
↓
7.3.4. Parameter Settings
Set the parameters for Serial Communications
Unit.
↓
7.3.5. Transferring the Project Data
Transfer the project data to PLC.
↓
7.3.6. Starting the CX-Protocol and
Opening the project file
Start CX-Protocol and open the project file.
↓
7.3.7. Connecting Online and
Transferring the Protocol Macro
Data
Connect online with CX-Protocol and transfer the
protocol macro data to Serial Communications
Unit.
↓

7
．
Serial Communications Connection Procedure
11
7.4. Serial Communication Status
Check
Start the send/receive processing and confirm that
serial communications performs normally.
↓
7.4.1. Starting the Trace
Start tracing with CX-Protocol.
↓
7.4.2. Executing the Communications
Sequence
Execute the communications sequence using
CX-Programmer.
↓
7.4.3. Checking the Trace Data
Check with the trace data in CX-Protocol that the
correct data are sent and received.
↓
7.4.4. Checking the Receive Data
Check that the correct data is written to the I/O
memory of PLC using CX-Programmer.

7
．
Serial Communications Connection Procedure
12
7.2. Sensor Controller Setup
Set up Sensor Controller.
7.2.1. Hardware Settings
Connect cables and others to Sensor Controller.
Precautions for Correct Use
Make sure that the power supply is OFF when you set up.
1
Make sure that Sensor
Controller is powered OFF.
*If it is ON, the settings
described in the following steps
and subsequent procedures
may not be applicable.
2
Check the position of
connectors on Sensor Controller
by referring to the figure on the
right.
3
Connect the calibration ROM to
ROM connector.
4
Connect Fiber connector on
Sensor Head to Fiber adapter.
Fiber adapter
ROM connector
RS-232C connector
24 V input terminal
block

7
．
Serial Communications Connection Procedure
13
5
Connect an RS-232C cable (for
PLC or programmable terminal)
to RS-232C connector.
6
Connect 24 VDC power supply
to 24 V input terminal block.
*For details on specifications of
24 VDC power supply available
for Sensor Controller, refer to
the Displacement Sensor
ZW-7000 series Confocal Fiber
Type Displacement Sensor
User’s Manual (Cat. No. Z362).
24 VDC power supply
RS-232C cable (for PLC or
programmable terminal)

7
．
Serial Communications Connection Procedure
14
7.2.2. Parameter Settings
Set the parameters for Sensor Controller.
1
Check the positions of each
keys and displays to use for
parameter settings.
2
Turn ON Sensor Controller.
3
The system enters the RUN
mode after displaying “INIT” for
a few seconds.
*The RUN Indicator is lit in the
RUN mode.
Press and hold the Mode
Switching Key for two seconds.
*5000
THRESHOLD H L RUN
4
OK/CAN is displayed.
Press the ZERO/SET Key once.
0kzcan
Main Display (White)
Sub-display (Green)
RUN Indicator (Green)
ZERORST/ESC Key
ZERO/SET Key
↓
(DOWN) Key
↑(UP) Key
→
(RIGHT)Key
←
(LEFT) Key
Mode Switching
Key

7
．
Serial Communications Connection Procedure
15
5
The operation mode is switched
to the FUNC mode, and SENS
is displayed on Main Display.
*The RUN Indicator goes out in
the FUNC mode.
Keep pressing the
→
(RIGHT)
or the
←
(LEFT) Keys until
SYSTEM is displayed.
Press the ZERO/SET Key once
THRESHOLD H L RUN
6
H.CALIB is displayed on Main
Display.
Keep pressing the
→
(RIGHT)
or the
←
(LEFT) Keys until COM
is displayed.
Press the ZERO/SET Key once.
7
RS232C is displayed on Main
Display.
Press the ZERO/SET Key once.

7
．
Serial Communications Connection Procedure
16
8
DATA is displayed on Main
Display.
Press the ZERO/SET Key once.
Check that the following set
value is displayed on
Sub-display.
Data length: 8bit (Default)
*If the value is different, change
the value by pressing the
↑
(UP) or the
↓
(DOWN) Keys.
Press the ZERORST/ESC Key
once.
The first menu shown in this
step is displayed again.
Press the
→
(RIGHT) Key once.
8blt
9
PARITY is displayed on Main
Display.
Press the ZERO/SET Key once.
Check that the following set
value is displayed on
Sub-display.
Parity: OFF (None: Default)
Press the ZERORST/ESC Key
once.
*If the value is different, change
the value by pressing the
↑
(UP) or the
↓
(DOWN) Keys.
The first menu shown in this
step is displayed again.
Press the
→
(RIGHT) Key once.
0ff
<Setting range>
8bit (Default)
/7bit
<Setting range>
OFF (Default)
/ODD/EVEN

7
．
Serial Communications Connection Procedure
17
10
STOP is displayed on Main
display.
Press the ZERO/SET Key once.
Check that the following set
value is displayed on
Sub-display.
Stop bit: 1bit (Default)
Press the ZERORST/ESC Key
once.
*If the value is different, change
the value by pressing the
↑
(UP) or the
↓
(DOWN) Keys.
The first menu shown in this
step is displayed again.
Press the
→
(RIGHT) Key once.
1blt
11
BAUD.RT is displayed on Main
Display.
Press the ZERO/SET Key once.
Check that the following set
value is displayed on
Sub-display.
Baud rate: 38400 (Default)
Press the ZERORST/ESC Key
once.
*If the value is different, change
the value by pressing the
↑
(UP) or the
↓
(DOWN) Keys.
The first menu shown in this
step is displayed again.
Press the
→
(RIGHT) Key once.
38400
<Setting range>
1bit (Default)
/2bit
<Setting range>
9600/19200/
38400 (Default)
/57600/115200