Siemens SIMATIC EM 148-FC, Manual

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Functions and Technical Specifications
4-17
EM 148-FC Frequency Converter
A5E00065321-03
4.3 Inching mode
Inching mode allows you to turn the motor at low operating speeds. It can be
controlled in the following ways:
By means of control bits from the programmable controller
By means of keys on the hand-held controller
4.3.1 Inching mode from the programmable controller
Prerequisites
The following prerequisites must be met to execute inching mode from the
programmable controller:
Control bits 0 to 2 must be set
Control bit 3 must be reset
Setpoint value = 0
Control bit 10 must be set
Procedure
Table 4-6 Procedure for inching mode from the programmable controller
Step Effect
Control bit 8 or 9 is set Ramp-up to the parameterized motor
frequency required for inching mode
(Inching frequency parameter)
Control bit is reset again Ramp-down to standstill
If control bits 8 and 9 are set at the same time, the motor stops.