Watson-Marlow MM420 - Manual (Page 115)

Issue 10/06 3 Functions
MICROMASTER 420 Operating Instructions
6SE6400-5AA00-0BP0 115
Parameter number (PNU)
The complete parameter number (refer to the parameter list) is formed from the
"basis parameter number” PNU1 and the "page parameter number” PNU2. The
following applies:
PNU = PNU1 + 2000
• PNU2
With PNU2 definition:
PNU2 2 nd word
15 14 13 12 Bit No.:
2 0 2 3 2 2 2 1 Weighting
The parameter areas are mapped using PNU1 and PNU2 as follows:
Basis parameter number
PNU1
bits 0 – 10 (PKE) Page parameter number
PNU2
bits 12 – 15 (IND)
Parameter number
(area)
0 ... 1999 0 0 ... 1999
0 ... 1999 1 2000 ... 3999
0 ... 1999 2 4000 ... 5999
0 ... 1999 3 6000 ... 7999
0 ... 1999 4 8000 ... 9999
... ... ...
0 ... 1999 15 30000 ... 31999
Index
The index (bit 0 to 7), depending on the task, describes a definite element:
desired array element in the case of indexed parameters,
desired element of the parameter description,
Special significance of index value 255
For the following requests, the index value 255 has a special significance:
"request parameter descriptive element", or.
for the requests to read/write indexed parameters (= arrays)
Here, the following applies:
Task ID Meaning
4 The complete parameter description is requested
6
All values of the indexed parameters are requested
This request can generate fault message 102.
7, 8, 11
or 12 All values of the indexed parameters should be changed.
These requests can generate fault message 102.