Datasheet
213High-speed Counter Unit
Programmable
Controllers
CJ1W-CT021
High-speed Counter Unit
High-speed, flexible control with a wide array
of features
• Input frequencies to 500 kHz.
• 32-bit counting range.
• Variable digital noise filter provided.
• 5-/12-/24-V line driver inputs
• Supports simple, ring, and linear counting modes.
• Supports two external control inputs, and a total of
16 functions can be set: open gate, close gate, pre-
set, reset, capture, stop/capture/reset combina-
tions, reset enable, and more.
• One Unit supports two external outputs and 30 inter-
nal outputs with counter value zone comparisons,
target comparisons, delays, holds, programmable
outputs, and hysteresis settings.
• Pulse rate measurement function and data logging.
• Counter outputs and external control inputs can be
used to trigger interrupt tasks in the CPU Unit.
Function
The High-speed Counter Unit counts pulse signal inputs that are too
fast to be detected by normal Input Units. The Unit can be programmed
to produce outputs according to counter values for specified conditions,
and many other functions are supported.
System Configuration
Specifications
Counter input
Encoder
Unit name High-speed Counter Unit
Classification Special I/O Unit
Unit numbers 0 to 92
Countable inputs 2 channels
Counter modes Simple counter Linear or ring counter
Input types Differential phase inputs (x1) Differential phase inputs
(x1, x2, x4)
Up/Down pulse inputs Pulse and direction inputs
Countable frequencies 50 kHz 10, 50, or 500 kHz
Counter values 8000 0000 to 7FFF FFFF
(–2,147,483,648 to 2,147,483,647)
Liner counter: 8000 0000 to 7FFF FFFF (–2,147,483,648 to 2,147,483,647)
Ring counter: 0000 0000 to FFFF FFFF (0 to 4,294,967,295)
Counter inputs
Input signals Phases A, B, and Z
Input voltage
(selected via connector)
24 V DC 5 V DC (for ch1 only) 12 V DC (for ch2 only) Line driver
External inputs Number of inputs: 2
Input voltage 24 V DC
External outputs Number of outputs: 2 (switchable between NPN and PNP)
External power supply 10.2 to 26.4 V DC
Max. switching capacity 46 mA at 10.2 V to 100 mA at 26.4 V
Response time 0.1 ms max.
Leakage current 0.1 mA max.
Residual voltage 1.5 V max.
Control methods Simple counter: Forced ON/OFF, Linear counter: Forced ON/OFF, zone comparison, and target comparison
Y201-EN2-03.book Seite 213 Donnerstag, 30. März 2006 1:52 13