Differences Of Nj Series From Cj Series; Functional Difference - Omron CJ1W-CT021 Operation Manuals

Appendices
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
Number of Counters 2
Counter Type • Simple Counters
• Circular Counters
• Linear Counters
Maximum Input Fre- 500 kHz
quency
Maximum Response 0.5 ms
Time
Input Signal A phase, B phase, Z phase
External Input/Output • External control inputs: 2
• External outputs: 2 (O0, O1)
Types of Inputs • Phase difference pulse input 1, 2, 4x
• Addition/subtraction pulse input
• Pulse + direction input
Control of Counters • Open gate (Counter start)
using allocation area
• Close gate (Counter stop)
(CIO)
• Counter presets
• Counter resets
• Counter value capture
External Control Input • Gate function
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
Output Control Mode • Automatic ON/OFF output according to the
following two modes
• Pulse rate range control
• Manual output control
A-2
Function in CJ series
Bandwidth Comparison Mode
Target Value Match Comparison Mode
CJ-series High-speed Counter Units Operation Manual for NJ-series CPU Unit(W492)
Function in NJ series
Same as on the left.
Same as on the left.
Same as on the left.
Same as on the left.
Same as on the left.
Same as on the left.
Same as on the left.
Counter value capture cannot be used.
The capture, Stop/capture/continue, Stop/cap-
ture/reset/continue, and Capture/reset func-
tions cannot be used.
Pulse rate range control cannot be used.