
Functions
5.11 Operation in fieldbus systems
Frequency inverter
178
Operating Instructions, 08.10. 2008, t.b.d.
Parameter ID (PKE), first word
The parameter ID (PKE) is always a 16 bit value.
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Figure 5-31 PKE structure
●
Bits 0 to 10 (PNU) contain the rest of the parameter number (value range 1 to 61999).
An offset must be added, which is defined by IND with the upper bits (acyclic) or the lower
bits (cyclic) of the byte, for parameter numbers ≥ 2000.
●
Bit 11 (SPM) is reserved and is always 0
●
Bits 12 to 15 (AK) contain the request or response ID
The meaning of the request ID for request message frames (master → converter) is
explained in the following table.
Table 5- 60 Request ID (master → converter)
Response
ID
Request
ID
Description
positive negative
0
No request
0
7 / 8
1
Request parameter value
1 / 2
↑
2
Change parameter value (word)
1
|
3
Change parameter value (double word)
2
|
4
Request descriptive element
1)
3
|
6
Request parameter value (field)
1)
4 / 5
|
7
Change parameter value (field, word)
1)
4
|
8
Change parameter value (field, double word)
1)
5
|
9
Request number of field elements
6
|
11
Change parameter value (field, double word) and save in EEPROM
2)
5
|
12
Change parameter value (field, word) and save in EEPROM
2)
4
|
13
Change parameter value (double word) and save in EEPROM
2
↓
14
Change parameter value (word) and save in EEPROM
1
7 / 8
1) The required element of the parameter description is specified in IND (second word).
2) The required element of the indexed parameter is specified in IND (second word).