INVT Goodrive3000 Series, Руководство по эксплуатации

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Goodrive3000 series medium voltage VFD PROFIBUS communication
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9.4.3 Process data (PZD) 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 nodes always transmit the latest valid data on the interfaces.
CW - control word (from the master to a slave, see Table 9-6): Using CWs is the basic method of the fieldbus system to
control the VFD. A CW is transmitted by the fieldbus master node to the VFD. In this case, the EC-TX103 communication
card functions as a gateway.
SW - status word (from a slave to the master, see Table 9-10): The VFD responds to the bit code information of the CW
and feeds state information back to the master through an SW.
PZD2
–PZD12 - process data (user defined)
Note: A PZD contains the output (that is, reference value) sent from the master node to the slave node and the
input (that is, actual value) sent from the slave node to the master node.
Reference value (see Table 9-8 ): The VFD may receive control information in multiple channels, including analog and
digital input terminals, VFD control panel, and EC-TX103 communication card. To enable the control over the VFD
through PROFINET, you need to set the EC-TX103 communication card as the controller of the VFD.
Actual value (see Table 9-12 ): An actual value is a 16-bit word that includes information about VFD operation. The
monitoring function is defined through VFD parameters. The conversion scale of an integer transmitted as an actual value
from the VFD to the master depends on the set function.
Note: The VFD always checks the bytes of a CW and reference value.
Mission message (from the master station to the rectifier unit)
Table 9-5 Control word (CW) of the rectifier unit
Bit Name Value Status/description
0
–7
COMMAND BYTE
Communication-based control
command
1 Run
2
3
4
5 Normal stop
6
7 Fault reset
8
9 Power-on buffering
8 WIRTE ENABLE
1 Write enabling (mainly PKW1-PKW4 )
9
–10
Reserved
11 Reserved
14 Reserved
15 HEARTBEAT REF
1 Heartbeat enable
0 Heartbeat disable
Mission message (from the master station to the VFD)
The first word of PZD is control word (CW) of VFD. The CW definition is described as following:
Table 9-6 Control word (CW) of the VFD
Bit
VFD CW
Name Value Status/description
00 HEARTBEAT REF 1 Heartbeat enable