Process Data (Pzd) Zone - INVT Goodrive3000 Series Operation Manual

Goodrive3000 series medium voltage VFD

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)
Bit
0–7 Communication-based control
8
9–10
11
14
15
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:
Bit
00
Table 9-5 Control word (CW) of the rectifier unit
Name
COMMAND BYTE
command
WIRTE ENABLE
Reserved
Reserved
Reserved
HEARTBEAT REF
Table 9-6 Control word (CW) of the VFD
Name
HEARTBEAT REF
Value Status/description
1 Run
2
3
4
5 Normal stop
6
7 Fault reset
8
9 Power-on buffering
1 Write enabling (mainly PKW1-PKW4 )
1 Heartbeat enable
0 Heartbeat disable
VFD CW
Value Status/description
1 Heartbeat enable
-220-
PROFIBUS communication