NORD Drivesystems BU0550 - Manual (Page 26)

PLC logic for NORD SK 54xE frequency inverters
26 BU 0550 GB-0813
3.2.2.4 LIMIT
This command limits the value in the accumulator to transferred minimum and maximum values. If this is
exceeded the maximum value in the accumulator is transferred and the minimum value is transferred if this
is undershot. There is no effect if the value is within the limits.
BOOL BYTE INT DINT
Possible data types X X X
Commands Explanation
LD 10 Loads the value 10 into the accumulator
LIMIT 20,30 The value is compared with the limits 20 and 30. The value
in the accumulator is smaller, the accumulator is overwritten
with 20
ST Value1 Saves the value 20 in Value1
Table 14 LIMIT
3.2.2.5 MAX
This command determines the maximum value of two variables or constants. For this, the current value of
the accumulator is compared with the value transferred in the MAX command. After the command, the
larger of the two values is in the accumulator.
Both values must belong to the same type of variable.
BOOL BYTE INT DINT
Possible data types X X X
Commands Explanation
LD 100 Load 100 into the accumulator
MAX 200 Compare with the value 200
ST Value2 Save the value 200 in Value2 (because it is the larger
value)
Table 15 MAX
3.2.2.6 MIN
This command determines the minimum value of two variables or constants. For this, the current value of
the accumulator is compared with the value transferred in the MIN command. After the command, the
smaller of the two values is in the accumulator.
Both values must belong to the same type of variable.
BOOL BYTE INT DINT
Possible data types X X X
Commands Explanation
LD 100 Load 100 into the accumulator
MIN 200 Compare with the value 200
ST Value2 Save the value 100 in Value2 (because it is the smaller
value)
Table 16 MIN