Goodrive3000 series medium voltage VFD PROFIBUS communication
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transmit the latest valid data on the interfaces.
CW
: Control word (sent from the master node to a slave node), a basic method for the fieldbus to control
VFDs. In the communication, EC-TX103 communication card functions as a gateway.
SW
: Status word (sent from a slave node to the master node). The VFD responds according to the bit
code information in the CW and sends back the status information to the master node by using the 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
: The VFD may receive control information from multiple channels, including analog and
digital input terminals, VFD control panel, and communication modules (such as RS485 and EC-TX-103
communication cards). To enable the control over the VFD through PROFIBUS, you need to set
EC-TX103 communication card as the controller of the VFD.
Actual value
: 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.
Task packet (from master to rectifier)
Table 9.5 Goodrive3000 series rectifier CW
Bit
Name
Value
State to be entered/Used to
0
–7
Communication-based
control command
1
Run
2
3
4
5
Normal stop
6
7
Fault reset
8
9
Power-on buffering
8
Enabling writing
1
Enable writing (mainly through PKW1 to PKW4)
9
–10
Reserved
11
Reserved
14
Reserved
15
Heartbeat reference
1
Enable heartbeat
0
Disable heartbeat
