Operating Instructions – MOVITRAC® B
85
5
Communication and unit profile
Startup
5.11.1 Process data
Process data (PD)
are all time-critical (realtime) data of a process that have to be pro-
cessed or transmitted quickly. They are characterized by high dynamic properties and
actuality.
Process data are, for example, setpoints and actual values of the frequency inverter, but
also peripheral states of limit switches. Process data are exchanged cyclically between
programmable controller and frequency inverter.
The actual control of the MOVITRAC
®
B frequency inverter is implemented via process
data.
Process input data (PI) and process output data (PO) are basically handled separately.
This means you can define the specific process output data (setpoints) to be sent in the
application from the controller to the inverter and the process input data (actual values)
to be sent from the MOVITRAC
®
B frequency inverter in opposite direction to the higher-
level controller.
To control the inverter via communication interface, the inverter must first be switched
to the relevant control signal source and setpoint source. Distinguishing between control
signal and setpoint source allows for the most various combinations. For example, the
drive can be controlled via fieldbus and uses the analog setpoint as setpoint. Next, the
parameters for describing the process output data are used for informing the frequency
inverter how to interpret the received process data.
Parameter
P100 setpoint source
is used to specify the communication interface which
the frequency inverter uses for processing the setpoint.
Parameter
P101 control signal source
is used to specify how the frequency inverter is
controlled. The inverter expects the control world of the source set in this parameter.
Setting: TERMI-
NALS
With this setting, the frequency inverter is controlled using only digital inputs and, if re-
quired, using the IPOS
plus®
control program.
Parameters
Communication interface
P100 setpoint source
RS485
Fieldbus
SBus
...
Parameters
Inverter control via
P101 control signal source
Terminals
RS485
Fieldbus
SBus
00
I
Summary of Contents for Movitrac B
Page 2: ...SEW EURODRIVE Driving the world...
Page 259: ......
