Issue 01/06 | Parameter Description |
P2013[2] USS PKW length |
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CStat: | CUT | Datatype: U16 | Unit: - | Def: | 127 |
| COMM | Active: first confirm | QuickComm.: No | Max: | 127 |
Defines the number of
Level
3
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,
Possible Settings:
0No words
33 words
44 words
127Variable
Index:
P2013[0] : Serial interface COM link
P2013[1] : Serial interface BOP link
Example:
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| U16 (16 Bit) | U32 (32 Bit) | Float (32 Bit) |
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| P2013 | = 3 | X | Parameter access fault | Parameter access fault |
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| P2013 | = 4 | X | X | X |
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| P2013 | = 127 | X | X | X |
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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
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 |
PKE IND PWE
1word
each 16 Bit
P2013 = 4 | P2013 |
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PKE | IND | PWE |
PKE | Parameter ID |
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IND |
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PWE | Parameter value |
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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
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))
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| P2013 = 3 | P2013 = 4 |
| P2013 = 127 |
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| Master → | MM4 | 22BC 0000 0005 | 22BC 0000 0000 0005 | 22BC | 0000 0005 0000 |
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| MM4 → | Master | 12BC 0000 0005 | 12BC 0000 0000 0005 | 12BC | 0000 0005 |
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MICROMASTER 440 Parameter List |
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| 197 | ||||||
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