14
MOVIDRIVE
®
DeviceNet DFD11A
3
Project Planning and
Startup
3.3 Process data exchange
3.3.1 Polled I/O
The polled I/O messages correspond to the process data messages of the SEW fieldbus profile and
up to three process data words can be exchanged between the control and the inverter.
The process data length can be set with MX_SHELL (version 1.30 or later) and DBG (version .13 or
later) using the parameter
P877 DeviceNet PD Configuration
. The inverter must be switched off
and on again after this parameter has been changed, in order to activate the set process data
length.
The process data length can also be set using the parameter data channel of DeviceNet. The pro-
cess data configuration takes effect immediately, if the process data length is set using the param-
eter data channel.
IMPORTANT:
The set process data length determines the process data lengths of both the polled I/O and the bit-
strobe I/O messages, i.e. the settings for the process data lengths of both the polled I/O and the
bit-strobe I/O always have to be identical
in the control.
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