Appendices
A-2
CJ-series High-speed Counter Units Operation Manual for NJ-series CPU Unit(W492)
A-1
Differences of NJ Series from CJ
Series
You can use the CJ1W-CT021 High-speed Counter Unit with the NJ-series Units.
If this Unit is used with the NJ Series, some functions become unavailable compared to when it is used
with the CJ Series.
The following shows differences between the NJ Series and the CJ-series for each function of this HSC
Unit.
A-1-1
Functional Difference
Item
Function in CJ series
Function in NJ series
Number of Counters
2
Same as on the left.
Counter Type
• Simple Counters
• Circular Counters
• Linear Counters
Same as on the left.
Maximum Input Fre-
quency
500 kHz
Same as on the left.
Maximum Response
Time
0.5 ms
Same as on the left.
Input Signal
A phase, B phase, Z phase
Same as on the left.
External Input/Output
• External control inputs: 2
• External outputs: 2 (O0, O1)
Same as on the left.
Types of Inputs
• Phase difference pulse input 1, 2, 4x
• Addition/subtraction pulse input
• Pulse + direction input
Same as on the left.
Control of Counters
using allocation area
(CIO)
• Open gate (Counter start)
• Close gate (Counter stop)
• Counter presets
• Counter resets
• Counter value capture
Counter value capture cannot be used.
External Control Input
Function
• Gate function
• Reset function
• Preset function
• Capture function
• Stop/capture/continue functions
• Stop/capture/reset/continue functions
• Capture/reset functions
• Reset enable function
• Reset disable function
The capture, Stop/capture/continue, Stop/cap-
ture/reset/continue, and Capture/reset func-
tions cannot be used.
Output Control Mode
• Automatic ON/OFF output according to the
following two modes
Bandwidth Comparison Mode
Target Value Match Comparison Mode
• Pulse rate range control
• Manual output control
Pulse rate range control cannot be used.