Siemens G85139 - Manual (Page 18)

English 4. OPERATING MODES
G85139-H1750-U049-B © Siemens plc 1997
26/09/97 18
4.3 Stopping the Motor
Stopping can be achieved in several ways:
•
Cancelling the ON command or pressing the OFF button (O) on the front panel causes the inverter to
ramp down at the selected ramp down rate
(see P003).
•
OFF2 - operation causes the motor to coast to a standstill (see parameters P051 to P053).
•
OFF3 - operation causes rapid braking (see parameters P051 to P053).
•
DC injection braking up to 250% causes a rapid stop (see P073).
4.4 If the Motor Does Not Start Up
If the display shows a fault code, refer to Section 6.
If the motor does not start up when the ON command has been given, check that the ON command is valid,
check if a frequency setpoint has been entered in P005 and check that the motor specifications have been
entered correctly under parameters P081 to P085.
If the inverter is configured for operation via the front panel (P007 = 001) and the motor does not start when
the RUN button is pressed, check that P121 = 001 (RUN button enabled).
If the motor does not run after parameters have been changed accidentally, reset the inverter to the factory
default parameter values by setting parameter P944 to 001 and then pressing P.
4.5 Local and Remote Control
The inverter can be controlled either locally (default), or remotely via a USS data line connected to the RS485
D-type connector on the front panel. (Refer to
parameter P910 in section 5 for the available remote control
options.)
When local control is used, the inverter can only be controlled via the front panel or the control terminals.
Control commands, setpoints or parameter changes received via the RS485 interface have no effect.
When operating via remote control the inverter will not accept control commands from the terminals.
Exception: OFF2 or OFF3 can be activated via parameters P051 to P053 (refer to parameters P051 to P053
in section 5).
Several inverters can be connected to an external control unit at the same time. The inverters can be
addressed individually.
For further information, refer to the following documents (available from your local Siemens office):
E20125-B0001-S302-A1 Application of the USS Protocol in SIMOVERT Units 6SE21 and
MICROMASTER (German)
E20125-B0001-S302-A1-7600 Application of the USS Protocol in SIMOVERT Units 6SE21 and
MICROMASTER (English)