Reversible Counter - Cntr(12) - Omron C200H Operation Manual

Timer and Counter Instructions
00000 TIM 001 CNT 002
TIM 001
00001
CNT 002
00000 25502
00001
CNT 001
Caution The shorter clock pulses will not necessarily produce accurate timers be-
5-12-4 REVERSIBLE COUNTER – CNTR(12)
Limitations
Description
TIM 001
CP
CNT
002
#0100
R
In the following example, CNT 001 counts the number of times the 1-second
clock pulse bit (25502) goes from OFF to ON. Here again, 00000 is used to
control the times when CNT is operating.
Because in this example the SV for CNT 001 is 700, the Completion Flag for
CNT 002 turns ON when 1 second x 700 times, or 11 minutes and 40 sec-
onds have expired. This would result in 00202 being turned ON.
CP
R
cause their short ON times might not be read accurately during longer cycles.
In particular, the 0.02-second and 0.1-second clock pulses should not be
used to create timers with CNT instructions.
Ladder Symbol
II
CNTR(12)
DI
R
Each TC number can be used as the definer in only one TIMER or COUNT-
ER instruction.
The CNTR(12) is a reversible, up/down circular counter, i.e., it is used to
count between zero and SV according to changes in two execution condi-
tions, those in the increment input (II) and those in the decrement input (DI).
Address
00000
#0050
005.0 s
00001
00002
00003
00004
00005
00201 00006
00007
00008
Address Instruction
CNT
00000 LD
001
00001 AND
#0700
00002 LD NOT
00003 CNT
0202
00004 LD
00005 OUT
N
Operand Data Areas
SV
SV: Set value (word, BCD)
Section 5-12
Instruction Operands
LD 00000
AND NOT TIM
AND NOT CNT
TIM
# 0050
LD TIM
LD 00001
CNT
# 0100
LD CNT
OUT 00201
Operands
00000
25502
00001
001
# 0700
CNT 001
00202
Definer Values
N: TC number
# (000 through 511)
IR, AR, DM, HR, LR, #
121
001
002
001
001
002
002