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3 Operation and Configuration
3-1
Overview
3-1-1
Summary
You can make the Unit settings after you complete registration of the CJ1W-CT021 High-speed
Counter Unit to the Unit Configuration and registration of device variables for CJ-series Unit.
Unit settings are made with Edit Special Unit Settings of Sysmac Studio. Alternatively, set device vari-
ables for CJ-series Unit (for setting) (refer to 4-1 Overview) in the user program.
The setting by device variables for CJ-series Unit (for setting) is available only with Counters set as Cir-
cular/Linear Counters (by the DIP switch on the front face of the Unit). Simple Counters use the default
setting and cannot be set by the device variables for CJ-series Unit (for setting).
This section describes how to set the CJ1W-CT021 High-speed Counter Unit to meet the specific
needs of the user application. (Refer to 1-4 Quick Start Up Reference Guide for an overview of the con-
figuration items for every Counter).
Also throughout this section, the device variables for CJ-series Unit that are relevant to operate the Unit
from the CPU Unit user program are mentioned. For details on device variables for CJ-series Unit (for
input/output), refer to 4-2-3 Details of Device Variables for CJ-series Unit (for input/output). For details
of device variables for CJ-series Unit (for setting), refer to 4-2-4 Details of Device Variables for CJ-
series Unit (for setting).
3-1-2
List of Functions/Allocation Areas by Purpose
Refer to Explanation of functions used (reference), Name of device variable for CJ-series Unit (for
input/output), and Name of device variable for CJ-series Unit (for setting) shown below according to the
purpose for which you will use the High-speed Counter Units.
Determining How the Counter Will Be Used
Purpose
To select a pulse input
3-3 Input Signal Types
method
• Phase differential
• Up & down pulse
• Pulse & direction
3-2
Explanation of functions used
(reference)
CJ-series High-speed Counter Units Operation Manual for NJ-series CPU Unit(W492)
Name of
device variable
Name of device variable
for CJ-series Unit
for CJ-series Unit (for setting)
(for input/output)
---
• Counter Types
• Signal Types
• Z-reset Mode/Overflow/
Underflow error-code genera-
tion
• Upper Count Limit Circular/
Linear
• Lower Count Limit Linear
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