Inverter Control; Frequency Inverter Control Using Digital Inputs (Two/Three-Wire Control) - Siemens SINAMICS G110D Operating Instructions Manual

Connection to a fieldbus
The SINAMICS G110D Inverter has been designed to operate on an AS-i network, therefore
you must connect the following inverter functions with the fieldbus:
● Command sources
● Setpoint sources
● Status messages
A connection with a fieldbus can be established using software tools in the control systems.
This manual includes descriptions of how connect and integrate the Inverter with a SIMATIC
control.
6.2

Inverter Control

6.2.1

Frequency inverter control using digital inputs (two/three-wire control)

Configuring start, stop and direction of rotation reversal using digital inputs
If the inverter is controlled using digital inputs, using parameter P0727, you can define how
the motor responds when it is started, stopped, and the direction of rotation is changed
(reversing).
Five different methods are available for controlling the motor. Three of the five control
methods just require two control commands (two-wire control). The other two control
methods require three control commands (three-wire control).
The wide range of setting options is especially intended to be able to emulate existing control
methods on the plant or system side if the inverter has to be integrated into an existing
application. The two most common methods use the factory setting (P0727 = 0) and are
available as standard in SINAMICS inverters.
Note
When clockwise rotation is activated, the inverter generates a clockwise voltage
characteristic at its output terminals. Whether the connected motor actually rotates clockwise
depends on the wiring between the inverter and motor.
Factory setting for "start", "stop", and "direction reversal" control commands
In the factory setting (P0727 = 0), the motor is operated using two control commands. In this
case, two versions are available
SINAMICS G110D
Operating Instructions, 2009-05-15, A5E02385577A AB
Functions
6.2 Inverter Control
81