Receiving Pulse Inputs - Omron CJ1G/H-CPU series Operation Manual

CJ1M Functions Arranged by Purpose
1-9-3

Receiving Pulse Inputs

Purpose
Receive incremental rotary encoder inputs to calculate length or position.
• Counting at low- Built-in
speed frequen- Inputs
cies (1 kHz max.)
• Counting at high- Built-in
speed frequen- Inputs
cies (30 kHz or
60 kHz max.)
Measure a workpiece's Built-in
length or position. Inputs
(Start counting when a
certain condition is
established or pause
counting when a certain
condition is estab-
lished.)
Measure a workpiece's Built-in
speed from its position Inputs
data (frequency mea-
surement.)
I/O Function
used
Interrupt inputs Interrupt inputs (Counter
0 to 3 mode)
Max. count frequency of
1 kHz (single-phase
pulses only) in increment
mode or decrement mode
High-speed High-speed counter func-
counters 0 and tions
1
• Differential phase input
• Pulse + direction input
• Up/down pulse input
• Increment input
Note The figures in
High-speed High-speed Counter Gate
counters 0 and
Bits (bits A53108 and
1 A53109)
High-speed PRV(881) (HIGH-SPEED
counter 0 COUNTER PV READ)
instruction
PRV2(883) (COUNTER
FREQUENCY CON-
VERT) instruction
Built-in inputs (bits 00 to 03 of
CIO 2960) can be used as counter
inputs.
The interrupt inputs must be set to
counter mode.
The PVs for interrupt inputs 0 through 3
are stored in A536 through A539,
respectively.
Built-in inputs (bits 02, 03, and 06 to 09
of CIO 2960) can be used as high-
speed counter inputs.
(4x multiplication) The PV for high-speed counter 0 is
30 kHz (50 kHz) stored in A270 and A271. The PV for
high-speed counter 1 is stored in A272
and A273.
60 kHz (100 kHz)
The counters can be operated in ring
mode or linear mode.
60 kHz (100 kHz)
60 kHz (100 kHz)
parentheses are
for line driver
inputs.
The high-speed counter can be started
or stopped (PV held) from the Unit's pro-
gram by turning ON/OFF the High-
speed Counter Gate Bits (bits A53108
and A53109) when the desired condi-
tions are met.
The PRV(881) instruction can be used
to measure the pulse frequency.
• Range with differential phase inputs:
• Range with all other input modes:
The PRV2(883) instruction can be used
to measure pulse frequency, and con-
vert the frequency to a rotational speed
(r/min.) or convert the counter PV to the
total number of revolutions (for high-
speed counters only). The result is cal-
culated from the number of pulses per
revolution.
Section 1-9
Description
0 to 50 kHz
0 to 100 kHz
71