Omron SYSMAC C20K Operation Manual page 114

Timer and Counter Instructions
Address
0000
0001
0002
0003
0004
0005
0006
0007
0008
0009
0010
0011
0012
0013
5-11-7 REVERSIBLE DRUM COUNTER – RDM(60)
Limitations
Description
Instruction Operands
LD 1813
MOV(21)
# 0905
DM
MOV(21)
# 1150
DM
MOV(21)
# 1450
DM
MOV(21)
# 1550
DM
LD 1815
OR 0005
OUT 1807
LD 0002
HDM(61)
HR
LD HR
AND NOT 0011
LD HR
AND 0011
Ladder Symbol
RDM(60) N
If any of the lower limits for the DM ranges are set to "0000," the correspond-
ing output bits are turned ON when the counter is reset.
The reversible drum counter is a ring counter with a counting range of 0000
to 9999. It requires three input signals to operate: a count input, reset input,
and UP/DOWN selection input. For these inputs, SR bits 1804 to 1806 are
reserved and cannot be used for any other purpose while the RDM(60) is
being used.
Operation is enabled when RDM(60) is executed with an ON execution con-
dition. RDM(60) increments when the UP/DOWN selection input (1806) is
OFF. When this input is ON, RDM(60) decrements. Incrementing or decre-
menting occurs on the rising edge of the count input signal. When RDM(60)
is executed by the CPU, the value in the counter buffer is transferred to CNT
46.
Address Instruction
0014 OR LD
0015 AND
0016 OR
32 0017 AND NOT
0018 OUT
0019 LD
33 0020 AND
0021 OR
0022 AND NOT
34 0023 AND NOT
0024 OUT
0025 LD
35 0026 AND NOT
0027 OR
0028 AND NOT
0029 OUT
0030 LD
47 0031 DIFU(13)
0 0032 LD
000 0033 AND
0034 OR
001 0035 AND NOT
0036 OUT
R
Section 5-11
Operands
0006
0100
0005
0100
0005
0003
0102
0100
0004
0102
0004
0102
0103
0003
0103
0003
1000
1000
0005
0101
0006
0101
Definer Values
N: TC number
Must be 46
Operand Data Areas
R: Result word
IR, HR, DM
103