DIGIVEX Motion - PROFIBUS
16
PVD 3554 GB 01/2004
The number of index of the DIGIVEX Motion parameter (as defined in user PVD 3527 “Directory
of Variables”) is defined using16-bits and made up as follows:
15 INDEX
0
4
PNUE 0 10
PNU
0
CONVERSION TABLE index range / PKW parameter header
The following values are given in hexadecimal format.
The digit of the AK section of the PKW is replaced by the letter “k” in this table.
The 2 digits of the SSIND section of the PKW are replaced by the letters “si” in this table.
16-bit parameter index
Parameter header in the PKW
(PKE+IND) 32-bits
0x
0000
0xk
000
si
00
… …
0x
03C4
0xk
3C4
si
00
… …
0x
07FF
0xk
7FF
si
00
0x
2800
0xk
000
si
05
… …
0x
2DC7
0xk
5C7
si
05
… …
0x
2FFF
0xk
7FF
si
05
Parameter value (PWE) 3
rd
and 4
th
word
The parameter value (PWE) is automatically transmitted as a double mot (32-bits). A PPO
telegram can only transmit a single value.
A 32-bit parameter value is made up of PWE1 (high order word, 3
rd
word) and PWE2 (low order
word, 4
th
word).
A 16-bit parameter value is transmitted in PWE2 (low order word, 4
th
word). In this case, PWE1
(high order word, 3
rd
word) must be given the value 0.
Rules for processing requests / responses
• A request or a response can only ever refer to one parameter.
• The master must continue to repeat a request until a corresponding response is received.
• The master identifies the response to a previously sent request by:
- analyzing the response identifier
- analyzing the parameter number PNU
- analyzing, if necessary, the parameter index IND
- analyzing, if necessary the parameter value PWE.
