Siemens SINAMICS G120 CU230P-2, Руководство по эксплуатации, Страница: 93 / 346

Adapting the terminal strip
5.4 Analog inputs
Frequency inverters with Control Units CU230P-2 HVAC, CU230P-2 DP, CU230P-2 CAN
Operating Instructions, 01/2011, FW 4.4, A5E02430659B AD
91
You must define your own characteristic if none of the default types match your particular
application.
Example
The inverter should convert a 6 mA … 12 mA signal into the value range -100 % … 100 %
via analog input 0. The wire break monitoring of the inverter should respond when 6 mA is
fallen below.
Parameter Description
p0756[0] = 3 Analog input type
Define analog input 0 as current input
with wire break monitoring.
Set DIP switch for AI
0 to current input
("I"):
, 8
After changing p0756 to the value 3, the inverter sets the scaling characteristic parameters to the
following values:
p0757[0] = 4,0; p0758[0] = 0,0; p0759[0] = 20; p0760[0] = 100
Adapt the characteristic:
p0761[0] = 6.0
Analog inputs wire break monitoring,
response threshold
p0757[0] = 6.0
p0758[0] = -100.0 Analog inputs, characteristic (x
1
, y
1
)
6 mA corresponds to -100 %
p0759[0] = 12.0
p0760[0] = 100.0 Analog inputs, characteristic (x
2
, y
2
)
12 mA corresponds to 100 %
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