INVT Goodrive35 Series Operation Manual page 254

Goodrive35 Series Closed-loop Vector Control VFD
PKW2-array index number
PKW3-parameter value 1
PKW4-parameter value 2
Process data:
CW-Control word (from master to slave, see "Control word (CW) of Goodrive35 series")
SW-state word (from slave to master, see "State word (SW) of Goodrive35 series")
PZD-process data (decided by users)
(From master to slave output 【given value】, from slave to master input【actual value】)
PZD area (process data area)
PZD area of communication message is designed for control and monitor VFD. PZD from master and
slave stations is addressed in high priority; the priority of dealing with PZD is superior to that of PKW,
and always sends current valid date from interface.
Control word (CW) and state word (SW)
Control word (CW) is a basic method of fieldbus system controlling VFD. It is sent by the fieldbus
master station to VFD and the EC-TX-103 communication cards act as gateway. VFD responds
according to the control word and gives feedbacks to master machine through state word (SW).
Given value: VFD can receive control information by several ways, these channels include: analog
and digital input terminals, VFD control board and communication module (such as RS485,
EC-TX-103 communication cards). In order to use PROFIBUS control VFD, the communication
module must be set to be VFD controller.
Actual value: Actual value is a 16-bit word, which contains converter operation information. Monitoring
capabilities are defined by VFD parameter. The integer scaling of actual value is sent to master
machine depending on selected function, please refer to VFD manual.
Note: VFD always check the control word (CW) and bytes of given value.
Mission message (from the master station to the VFD)
Control word (CW): The first word of PZD is control word (CW) of VFD; due to different control word
(CW) of PWM rectifier regenerative part and inverter part illustration is depart in next two tables.
Control word (CW) of Goodrive35 series
Bit
0–7 COMMAND BYTE
Name Value
1 Forward running
2 Reverse running
3 Forward jogging
4 Reverse jogging
5 Decelerate to stop
247
State/Description
Extension card