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Manual – MOVIDRIVE® MDX60B/61B Communication and Fieldbus Unit Profile
7
Process data
SEW Unit Profile
7.1
Process data
Process data (PD)
are all time-critical (realtime) data of a process that have to be
processed or transmitted quickly. They are characterized by high dynamic properties
and actuality. Process data are, for example, setpoints and actual values of the drive
inverter, but also peripheral states of limit switches. Process data are exchanged
cyclically between programmable controller and drive inverter.
The actual control of the MOVIDRIVE
®
inverter is carried out using process data.
Process input data (PI) and process output data (PO) are basically handled separately.
This means you can specify for your application the kind of output data (setpoints) to be
sent from the controller to the drive inverter and the process input data (actual values)
to be sent by MOVIDRIVE
®
to the higher-level controller.
However, to control the drive 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 drive inverter how to interpret the received process data.
Parameter
P100 setpoint source
is used to specify the communication interface which
the drive inverter uses for processing the setpoint.
Parameter
P101 control signal source
is used to specify how the drive inverter is
controlled. The inverter expects the control world of the source set in this parameter.
Setting:
TERMINALS
With this setting, the drive inverter is controlled using only binary inputs and, if required,
using the IPOS
plus®
control program.
Setting: RS485,
FIELDBUS, SBus
With this setting, the control word defined in the process output data channel is updated
by the set control signal source (RS485 / FIELDBUS / system bus).
The binary inputs and the IPOS
plus®
control program continues to be involved in the
control.
Parameter
Communication interface
P100 Setpoint source
RS485
Fieldbus
SBus
...
Parameter
Inverter control via
P101 Control signal source
Terminals
RS485
Fieldbus
SBus
Summary of Contents for MOVIDRIVE MDX60B
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