<< Click to Display Table of Contents >> Structure of a PKW telegram |
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PNU: parameter number
AK: Request (Output buffer) or response identifier (Input buffer)
Table 1: Request identifier (master to slave)
Request identifier (AK) |
Meaning |
Response identifier (AK) |
|
positive |
negative |
||
0 |
No request |
0 |
7 |
1 |
Request parameter value |
1 or 2 |
7 |
2 |
Modify parameter value (word) |
1 |
7 |
3 |
Modify parameter value (double word) |
2 |
7 |
6 |
Request parameter value (array) |
4 or 5 |
7 |
7 |
Modify parameter value (array, word) |
4 |
7 |
8 |
Modify parameter value (array, double word) |
5 |
7 |
9 |
Request number of array elements |
6 |
7 |
If the response identifier is „not possible to process request“ (value 7), there is an additional error code in the PWE (lower value, PWE2).
Table 2: Response identifier (valve to master)
Response identifier (AK) |
Meaning |
0 |
No response |
1 |
Transfer parameter value (word) |
2 |
Transfer parameter value (double word) |
4 |
Transfer parameter value (array, word) |
5 |
Transfer parameter value (array, double word) |
6 |
Transfer number of array elements |
7 |
Not possible to process request (error code in PWE2) |
Table 3: Error codes
Error code |
Meaning |
0 |
Illegal parameter number (PNU) |
1 |
No access rights |
2 |
Value out of range |
3 |
Wrong array index |
5 |
Wrong data type (The request does not correspond to the data type of the parameter) |
6 |
Setting not allowed (can only be reset) |
17 |
Request cannot be processed due to operating state |
20 |
Wrong value within value range |
201 |
Unknown command |