Ctd_Dint - ABB ACSM1 Firmware Manual

286

CTD_DINT

(10046)
Illustration
Execution time
Operation
Inputs
Outputs
CTU
(10049)
Illustration
Execution time
Standard function blocks
0.92 µs
The counter output (CV) value is decreased by 1 if the counter input (CD) value
changes from 0 -> 1 and the load input (LD) value is 0. If the load input (LD) value is 1,
the preset input (PV) value is stored as the counter output (CV) value. If the counter
output has reached its minimum value -2147483648, the counter output remains
unchanged.
The status output (Q) is 1 if the counter output (CV) value < 0.
Example:
LD CD
0 1 -> 0
0 0 -> 1
1 1 -> 0
1 0 -> 1
0 0 -> 1
1 1 -> 0
0 0 -> 1
CV is the previous cycle counter output value.
prev
Load input (LD): Boolean
Counter input (CD): Boolean
Preset input (PV): DINT
Counter output (CV): DINT
Status output (Q): Boolean
0.92 µs
PV Q
10 0
10 0
-2 1
1 0
5 1
-2147483648 1
10 1
CV CV
prev
5 5
5 5 - 1 = 4
4 -2
-2 1
1 1 -1 = 0
0 -2147483648
-2147483648 -2147483648