Siemens SINAMICS G120P, Руководство по эксплуатации

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Functions
7.7 Application-specific functions
Inverter cabinet units
Operating Instructions, 12/2014, A5E32923362A
375
Restrictions for the unit switchover function
● The values on the type plate of the inverter or motor cannot be displayed as percentage
values.
● Using the unit switchover function several times (for example, percent → physical unit 1 →
physical unit 2 → percent) may lead to the original value being changed by one decimal
place as a result of rounding errors.
● If the unit is switched to percentage and the reference value is then changed, the
percentage values relate to the new reference value.
Example:
–
For a reference speed of 1500 rpm, a fixed speed of 80% corresponds to a speed of
1200 rpm.
– If the reference speed is changed to 3000 rpm, then the value of 80% is kept and now
means 2400 rpm.
Switching units
The units can be switched via the IOP and via STARTER.
● Unit switchover via IOP is always performed immediately. Once the corresponding
parameters have been changed, the values affected are displayed in the new selected
unit.
● If STARTER is used, unit switchover can only take place in offline mode in the
configuration screen of the "Units" tab. The new units are not displayed until after the
download ("Load project to target system") and subsequent upload ("Load project to PG")
have been completed.
Reference variables for unit switchover
p2000 Reference speed reference frequency
p2001 Reference voltage
p2002 Reference current
p2003 Reference torque
r2004 Reference power
p2006 Reference temperature
7.7.1.1 Changing over the motor standard
You change over the motor standard using p0100. The following applies:
● p0100 = 0: IEC motor (50 Hz, SI units)
● p0100 = 1: NEMA motor (60 Hz, US units)
● p0100 = 2: NEMA motor (60 Hz, SI units)