ABB ACSM1 Firmware Manual

Standard function blocks
319
Operation 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:
Inputs Counter input (CD): Boolean
Load input (LD): Boolean
Preset input (PV): DINT
Outputs Status output (Q): Boolean
Counter output (CV): DINT
CTU
(10049)
Illustration
Execution time 0.92 µs
LD CD PV Q CV
prev
CV
01 -> 010 05 5
0 0 -> 1 10 0 5 5 - 1 = 4
11 -> 0-2 14 -2
10 -> 11 0-2 1
0 0 -> 1 5 1 1 1 -1 = 0
1 1 -> 0 -2147483648 1 0 -2147483648
0 0 -> 1 10 1 -2147483648 -2147483648
CV
prev
is the previous cycle counter output value.
CTU
95
TLA1 1 msec (1)
>CU
R
PV
CV
CV(95)
Q
Q(95)

ABB ACSM1 Specifications

General

Protection Class	IP20
Voltage Range	380 V to 480 V
Product Type Designation	ACSM1
Input Voltage	380-480 V AC
Communication Interfaces	Modbus RTU
Protection Features	Overcurrent, overvoltage, undervoltage, short circuit, overload, overtemperature
Operating Temperature	-10°C to +40°C
Storage Temperature	-40°C to +70°C
Humidity	5% to 95% (non-condensing)
Altitude	Up to 1000 m