Table of Contents
Advertisement
S5-95F
8.1.5
Counter Operations
The programmable controller uses counter operations to handle counting jobs. Counters can count
up and down.
The counting range is from 0 to 999 (three decades).
overview of the counter operations. Examples follow the table.
Operation
Operand
S
R
CU
CD
ID
Z
Loading a Count
Counter operations call internal counters.
When a counter is set, the word in ACCU 1 is used as a count. You must therefore first store
counts in the accumulator.
You can load a count with any of the following data types:
KC
constant count
or
DW
data word
IW
input word
QW
output word
FW
flag word
Loading a Constant Count
The following example shows how the count 38 is loaded.
L KC
38
EWA 4NEB 812 6210-02
Table 8-5. Overview of Counter Operations
Set Counter
The counter is set on the leading edge of the RLO.
Reset Counter
The counter is set to zero as long as the RLO is "1".
Count Up
The count is incremented by 1 on the leading edge of the RLO.
When the RLO is "0", the count is not affected.
Count Down
The count is decremented by 1 on the leading edge of the RLO.
When the RLO is "0", the count is not affected.
Parameter
Operation
Operand
Count (0 to 999)
Meaning
0 to 127
The data for these words must
be in BCD code.
STEP 5 Operations
Table 8-5 provides an
8-25
Advertisement
Table of Contents
