Siemens 440 - Manual (Page 197)

Issue 01/06 Parameter Description
MICROMASTER 440 Parameter List
6SE6400-5BB00-0BP0
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P2013[2] USS PKW length Min: 0
CStat: CUT Datatype: U16 Unit: - Def: 127
P-Group: COMM Active: first confirm QuickComm.: No Max: 127
Defines the number of 16-bit words in PKW part of USS telegram.
The PKW part consists of the PKE part (1. word), IND part (2. word) resp. PWE part (3. - n. word). In
contrary to the IND and PKE part, the PWE part can be varied. Depending on the particular requirement, 3-
word, 4-word or variable word lengths can be parameterized. The PKW part of the USS telegram is used to
read and write individual parameter values.
Possible Settings:
0 No words
3 3 words
4 4 words
127 Variable
Index:
P2013[0] : Serial interface COM link
P2013[1] : Serial interface BOP link
Example:
Parameter access fault
U16 (16 Bit) U32 (32 Bit) Float (32 Bit)
P2013 = 3 X
P2013 = 4 X X X
P2013 = 127 X X X
Parameter access fault
Data type
Notice:
USS protocol consists of PZD and PKW which can be changed by the user via parameters P2012 and
P2013 respectively. Parameter P2013 determines the number of PKW-words in a USS-telegram.
Setting P2013 to 3 or 4 determines the length of the PKW (3 = three words and 4 = four words). When
P2013 set to 127 automatically adjusts the length of the PKW words are required.
P2013 = 3
P2013 = 4
1 word
each 16 Bit
PKE IND PWE
P2013
PKE IND PWE
P2013
PKE
IND
PWE Parameter ID
Sub-index
Parameter value
If a fixed PKW length is selected only one parameter value can be transferred. In the case of indexed
parameter, you must use the variable PKW length if you wish to have the values of all indices transferred in
a single telegram. In selecting the fixed PKW length, it is important to ensure the value in question can be
transferred using this PKW length.
P2013 = 3, fixes PKW length, but does not allow access to many parameter values. A parameter fault is
generated when an out-of-range value is used, the value will not be accepted but the inverter state will not
be affected. Useful for applications where parameters are not changed, but MM3s are also used. Broadcast
mode is not possible with this setting.
P2013 = 4, fixes PKW length. Allows access to all parameters, but indexed parameters can only be read
one index at a time. Word order for single word values are different to setting 3 or 127, see example below.
P2013 = 127, most useful setting. PKW reply length varies depending on the amount of information needed.
Can read fault information and all indices of a parameter with a single telegram with this setting.
Example:
Set P0700 to value 5 (0700 = 2BC (hex))
P2013 = 3
Master → MM4 22BC 0000 0005 22BC 0000 0000 0005 22BC 0000 0005 0000
MM4 → Master 12BC 0000 0005 12BC 0000 0000 0005 12BC 0000 0005
P2013 = 4 P2013 = 127
Level
3