A-3
Appendices
CJ-series High-speed Counter Units Operation Manual for NJ-series CPU Unit(W492)
A-1 Diff
erences o
f NJ
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rie
s fr
o
m
CJ
S
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rie
s
App
A-1-1 Fun
c
tional Diff
erence
Output State Control
Can select the method to control the output
states when the CPU operation mode is
changed or when an error occurs.
• Continue updating output states automati-
cally.
• Hold the output states.
• Bring the pre-defined output state.
Same as on the left.
External Output
Driver Settings
External output drivers can be selected from
the two types shown below.
• NPN
• PNP
Same as on the left.
Counter Reset Condi-
tions
• Counter reset bit
• External control input
• Z signal
Same as on the left.
Other Functions
• Programmable output pulse
• Pulse rate measurement functions
• Hysteresis
The pulse rate measurement function cannot
be used.
Noise Filter
• Encoder noise filter
10 kHz, 50 kHz, 500 kHz
• External control input noise filter
10 kHz, 50 kHz
Same as on the left.
Counter Initial Values
• Counter initial values
Same as at the left. However, because the NJ
Series has no power OFF interrupt task, opera-
tion cannot be restarted from the position at
which the power was interrupted.
IORD Instruction,
IOWR Instruction
You can read or write the following data.
• Allocated DM data
• Bandwidth comparison data and target value
match comparison data
• Captured Counter Value
• Pulse rate history log file data
• Counter value
• High-speed Counter Unit set and reset
• Error clear
The IORD/IOWR instruction cannot be used.
Therefore, you cannot read or write the data on
the left.
Starting of External
Interrupt Task by Out-
put
You can use external output and internal output
unit output patterns to start CJ1-H/CJ1M CPU
Unit external interrupt tasks.
Cannot use.
Starting of External
Interrupt Task by
External Control Input
External control input can be used to start CJ1-
H/CJ1M CPU Unit external interrupt tasks.
Cannot use.
Error History Log
Functions
Up to 30
Same as on the left.
Item
Function in CJ series
Function in NJ series