Siemens Midimaster Eco Reference Manual page 113

ECO REFERENCE MANUAL
Parameter
Automatic calibration
Stator resistance (Ω)
•
Serial link slave address
•
Serial link baud rate
•
Function Range
[default]
0 - 1
[1]
0.01-
199.99
œœœ
[
0 - 30
[0]
3 - 7
[6]
Description / Notes
The motor stator resistance is used in the
inverter's internal current monitoring
calculations. When P088 is set to '1' and
the RUN button is pressed, the inverter
performs an automatic measurement of
motor stator resistance; stores it in P089
and then resets P088 to '0'.
If the measured resistance is too high for
the size of inverter (e.g. motor not
connected or unusually small motor
connected), the inverter will trip (fault code
F188) and will leave P088 set to '1'. If this
happens, set P089 manually and then set
P088 to '0'.
Can be used instead of P088 to set the
motor stator resistance manually. The value
] entered should be the resistance measured
across any two motor phases.
WARNING:
The measurement should be made at the
inverter terminals with power off.
If the value of P089 is too high then an
overcurrent trip (F002) may occur.
Up to 31 inverters can be connected via the
serial link and controlled by a computer or
PLC using the USS serial bus protocol. This
parameter sets a unique address for the
inverter.
Sets the baud rate of the RS485 serial
interface (USS protocol):
3 = 1200 baud
4 = 2400 baud
5 = 4800 baud
6 = 9600 baud
7 = 19200 baud
Some RS232 to RS485 converters are not
capable of baud rates higher than 4800.
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