ABB ACSM1 Firmware Manual page 254

254
Operation
Inputs
Outputs
Standard function blocks
The counter output (CV) value is increased by 1 if the counter input (CU) value changes
from 0 -> 1 and the reset input (R) value is 0.
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.
The counter output (CV) is reset to 0 if the reset input (R) is 1.
If the counter output has reached its minimum or maximum value, -32768 or +32767,
the counter output remains unchanged until it is reset (R) or until the load input (LD) is
set to 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:
CU CD R
0 -> 0 0 -> 0 0
0 -> 0 0 -> 0 0
0 -> 0 0 -> 0 1
0 -> 0 0 -> 0 1
0 -> 0 0 -> 1 0
0 -> 0 1 -> 1 0
0 -> 0 1 -> 1 1
0 -> 0 1 -> 1 1
0 -> 1 1 -> 0 0
1 -> 1 0 -> 0 0
1 -> 1 0 -> 0 1
1 -> 1 0 -> 0 1
1 -> 1 0 -> 1 0
1 -> 1 1 -> 1 0
1 -> 1 1 -> 1 1
1 -> 1 1 -> 1 1
CV is the previous cycle counter output value.
prev
Down counter input (CD): Boolean
Up counter input (CU): Boolean
Load input (LD): Boolean
Reset input (R): Boolean
Preset input (PV): INT
Down counter status output (QD): Boolean
Up counter status output (QU): Boolean
Counter output (CV): INT
LD PV QU
0 2 0
1 2 1
0 2 0
1 2 0
0 2 0
1 2 1
0 2 0
1 2 0
0 2 0
1 2 1
0 2 0
1 2 0
0 2 0
1 2 1
0 2 0
1 2 0
QD CV CV
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1 0 0
0 0 2
1 2 0
1 0 0
1 0 0 - 1 = -1
0 -1 2
1 2 0
1 0 0
0 0 0 + 1 = 1
0 1 2
1 2 0
1 0 0
1 0 0 - 1 = -1
0 -1 2
1 2 0
1 0 0