
I185 GB 06 15
LRX D01
37
COUNTERS AND COUNTER STATUS BITS (C MEMORY TYPE)
Counter status bits provide the relationship between the current value and the preset value of a selected counter. The counter status bit will be
on when the current value is equal or greater than the preset value of a selected counter. In this example, each time the input contact I04
transitions from off to on, the counter (C01) increments by one. When the counter reaches the preset of 2 counts, the counter status contact
C01 turns on. When C01 turns on, output Q05 will turn on. When M02 turns on counter C01 will reset. If M09 is turned on, the counter will
change from a count-up to a count-down counter.
NEGATIVE INPUT DIFFERENTIAL INSTRUCTION (ONE-SHOT)
A negative input differential instruction, or One-Shot, holds its status ON for one CPU scan when the preceding series contact transitions from
ON to OFF. This transition from ON to OFF is called a Negative Input Differential.
SPECIALTY MEMORY TYPES
General
SET
RESET
PULSE
NO
NC Number
output
output
output
output
contact
contact
Symbol
[
P
(NO/NC)
Lo
Hi
Used in function
block
Expansion input coil
X
x
12 (X01-X0C / x01-x0C)
Expansion output coil
Y
Y
Y
Y
Y
y
12 (Y01-Y0C / y01-y0C)
Differential (one shot)
D
d
RTC
R
R
r
31 (R01-R1F / r01-r1F)
Analog comparator
G
G
g
31 (G01-G1F / g01-g1F)
HMI
H
31 (H01-H1F)
PWM
P
2 (P01-P02)
DATA LINK
L
8 (L01-L08)
SHIFT
S
1 (S01)
POSITIVE INPUT DIFFERENTIAL INSTRUCTION (ONE-SHOT)
A positive input differential instruction, or One-Shot, holds its status ON for one CPU scan when the preceding series contact transitions from
OFF to ON. This transition from OFF to ON is called a Positive Input Differential.