Data Formats And Examples - Dell CMC-PD01 Operation Manual

PROFIBUS DP Slave Communication Card CMC-PD01
4.3.2 Introduction to PKW, PZD
After VFD-C2000 is connected to PROFIBUS DP network through CMC-PD01, there will be two ways to
poll AC motor drive parameters, PKW polling and PZD polling. PKW is composed of 4 words, and each
word represents particular definition. 4 words combined are able to read or write one AC motor drive
parameter. Change each word in PKW to poll all the parameters in the AC motor drive. When the AC
motor drive parameter is polled by PZD, PZD is able to map the address of the AC motor drive directly.
After PZD maps the address, it will fix to map the certain address. See Table 4.3-1, the 4 words in PKW
zone combined are able to read one parameter in the AC motor drive, but every word in PZD zone is able
to map one parameter address of the AC motor drive.
PKW
PKE IND PWE1 PWE2 PZD1 PZD2
st nd rd
1 2 3
word word word
PPO1
PPO2
PPO5
EXT CONF1
4.4

Data Formats and Examples

See Table 4.4-1 for the data form of PKW. As cyclical data, PKW data has request and response
mechanism, i.e. all masters are able to send new request message only after receiving the corresponding
responses.
PKW
bit15 bit14 bit13 bit12 bit11 bit10 bit9
Word 1
Word 2
Page number
Word 3
Word 4
DVP-PLC Operation Manual
st nd
th
1 2
4
word word
word
PPO3
PPO4
EXT CONF2
AK SPM
IND (sub-index of parameter)
PWE2 (read/write parameter value)
PZD
PZD3 PZD4 PZD5
rd th th
3 4 5
word word word
Table 4.3-1
Definitions of bit
bit8 bit7 bit6
PKE (parameter ID)
PNU (basic parameter number)
Not in use
PWE1 (reserved)
Table 4.4-1
PZD6 PZD7 PZD8
th th th
6 7 8
word word word
bit5 bit4 bit3 bit2
PZD9 PZD10
th th
9 10
word word
bit1 bit0
7