INVT Goodrive350 Series, Operation Manual

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Communication extension card PROFINET communication card
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4.4.2 PROFINET I/O communication
The PROFINET communication card supports 16-word input/output. Figure 4-4 shows the
packet format for transmitting data with a VFD.
Parameter
identification (PKW)
Process data
(PZD)
Distributable zone
PKW1 PKW2 PKW3 PKW4
CW
SW
PZD2 PZD3
PZD2 PZD3
PZD12
PZD12
Fixed
zone
Figure 4-4 Packet structure
By using the 32 inputs/outputs, you can set the reference parameters of the VFD, monitor the
state values, transmit control commands, monitor the running state, and read/write the
function parameters of the VFD. For specific operations, see the following description.
Parameter zone:
PKW1––Parameter identification
PKW2––Array index number
PKW3––Parameter value 1
PKW4––Parameter value 2
Process data:
CW––Control word (transmitted from the master to a slave. For description, see Table 4-5)
SW––State word (transmitted from a slave to the master. For description, see Table 4-7.)
PZD––Process data (defined by users)
(When the process data is output by the master to a slave, it is a reference value; and when
the process data is input by a slave to the master, it is an actual value.)
PZD zone (process data zone): The PZD zone in a communication packet is designed for
controlling and monitoring a VFD. The master and slave stations always process the received
PZD with the highest priority. The processing of PZD takes priority over that of PKW, and the
master and slave stations always transmit the latest valid data on the interfaces.
CWs and SWs
Using CWs is the basic method of the fieldbus system to control VFDs. A CW is transmitted by
the fieldbus master station to a VFD device. In this case, the adapter module functions as a
gateway. The VFD device responds to the bit code information of the CW and feeds state
information back to the master through an SW.
Reference value: A VFD device may receive control information in multiple channels, including