Omron CPM1 - PROGRAMING MANUAL 02-2001 Programming Manual page 70

CPM2A/CPM2C High-speed Counters
Encoder
inputs
Selecting the Input Mode and Reset Method
High-speed
counter function
DM 6642, bits 08 to 15
Count
Input mode
Differential phase input
Pulse + direction input
Up/down input
Increment input
PC Setup
DM 6642, bits
00 to 03
Every scan
Counter PV
SR 249 SR 248
Input Mode
Select the input mode for the high-speed counter according to the signal type.
Differential Phase Input Mode
In the differential phase input mode, the count is incremented or decremented
according to two differential phase signals with a multiplication of 4 (phase A and
phase B).
Maximum frequency: 5 kHz
Phase A
Phase B
PC Setup
Ladder diagram program
REGISTER COMPARI-
CTBL(63)
SON TABLE instruction
Register comparison
table
Start comparison
MODE CONTROL
INI(61)
instruction
Change PV
Start/stop
comparison
Each time
HIGH-SPEED COUNTER
PRV(62)
PV READ instruction
Read PV
Read comparison status
Read range comparison results
ON
OFF
ON
OFF
Count
Nms Frequency =
Section
Count-check interrupt
generated.
Specified subroutine executed
(when count-check interrupts are
used).
SBN(92)
RET(93)
Range comparison
results
AR 1100 to AR 1107
1,000
N x 4
2-2
49