ABB ACSM1 - Ctud_Dint

Standard function blocks
366
CTUD_DINT
(10050)
Illustration
Execution time 1.40 µs
Operation The counter output (CV) value is increased by 1 if the counter input (CU) changes from
0 -> 1 and the reset input (R) is 0 and the load input (LD) is 0.
The counter output (CV) value is decreased by 1 if the counter input (CD) changes from
0 -> 1 and the load input (LD) is 0 and the reset input (R) is 0.
If the counter output has reached its minimum or maximum value, -2147483648 or
+2147483647, the counter output remains unchanged until it is reset (R) or until the load
input (LD) is set to 1.
If the load input (LD) value is 1, the preset input (PV) value is stored as the counter
output (CV) value.
The counter output (CV) is reset to 0 if the reset input (R) is 1.
The up counter status output (QU) is 1 if the counter output (CV) value >
preset input
(PV) value.
The down counter status output (QD) is 1 if the counter output (CV) value < 0.
Example:
CTUD_DINT
98
TLA1 1 msec (1)
>CU
>CD
R
LD
PV
CV
CV(98)
QU
QU(98)
QD
QD (98)
CU CD R LD PV QUQDCV
prev
CV
0 -> 0 0 -> 0 0 0 2 0 1 0 0
0 -> 0 0 -> 0 0 1 2 1 0 0 2
0 -> 0 0 -> 0 1 0 2 0 1 2 0
0 -> 0 0 -> 0 1 1 2 0 1 0 0
0 -> 0 0 -> 1 0 0 2 0 1 0 0 - 1 = -1
0 -> 0 1 -> 1 0 1 2 1 0 -1 2
0 -> 0 1 -> 1 1 0 2 0 1 2 0
0 -> 0 1 -> 1 1 1 2 0 1 0 0
0 -> 1 1 -> 0 0 0 2 0 0 0 0 + 1 = 1
1 -> 1 0 -> 0 0 1 2 1 0 1 2
1 -> 1 0 -> 0 1 0 2 0 1 2 0
1 -> 1 0 -> 0 1 1 2 0 1 0 0
1 -> 1 0 -> 1 0 0 2 0 1 0 0 - 1 = -1
1 -> 1 1 -> 1 0 1 2 1 0 -1 2
1 -> 1 1 -> 1 1 0 2 0 1 2 0
1 -> 1 1 -> 1 1 1 2 0 1 0 0
CV
prev
is the previous cycle counter output value.