Features And Functions - Omron CJ1-CT021 Operation Manual

Features and Functions

1-1

Features and Functions

Freely Configurable
Counter Type
Input Signal Type
2
The CJ1W-CT021 High-speed Counter Unit is equipped with 2 Counters and
counts over a maximum binary range of 32-bits. Accepting input pulse frequencies
of up to 500 kHz allows precise control of fast motions. The Unit's bi-directional
counting ability enables detecting movement in either direction. Each Counter of
the Unit can be configured independently. The Unit is equipped with 2 Digital
Inputs, 2 Digital Outputs and 30 Soft Outputs. A maximum response time of
0.5 ms guarantees high-speed closed loop control of applications.
The CJ1W-CT021, a Special I/O Unit for CJ-series PLC-systems, is a freely con-
figurable High-speed Counter Unit. Depending on the requirements of your appli-
cation, the specific behaviour of the Unit can be adjusted by changing the
configuration settings.
Configuring the Unit starts with choosing one out of 3 Counter Types:
œ Simple Counter (refer to 3-2-1 "Simple Counter")
œ Circular Counter (refer to 3-2-2 "Circular Counter")
œ Linear Counter (refer to 3-2-3 "Linear Counter")
By default all Counters are set to Simple Counter for which no configuration set-
tings have to be made, enabling every Counter to count pulses directly after the
Unit has been powered up. For all Counter Types the full counting range is avail-
able. Circular and Linear Counters can be fully (DM-) configured according to the
application that is to be controlled.
Depending on the type of input signal that your application requires, for every
Counter a choice can be made out of three input signal types:
œ Phase Differential Inputs (multiplication by either 1, 2 or 4)
(refer to 3-3-1 "Phase Differential")
œ Up/Down Pulse Inputs (refer to 3-3-2 "Up & Down")
œ Pulse & Direction Inputs (refer to 3-3-3 "Pulse & Direction")
Section 1-1