Functions
8.7 Communication via USS
Control Units CU240S
8-30 Operating Instructions, 11/2006, A5E00766042B AA
If the response identifier is 7 (cannot process request), then one of the fault numbers listed in
the next table will be stored in parameter value 2 (PWE2).
Table 8-12 Fault numbers for "Cannot process request" response
No. Meaning
0 Illegal parameter number (PNU) Parameter does not exist
1 Parameter value cannot be modified Parameter is a read-only parameter
2 Minimum/maximum not reached/exceeded –
3 Faulty subindex –
4 No array Single parameter has been accessed
with array request and subindex > 0
5 Parameter type is wrong / incorrect data type Mix-up between word and double
word
6 Setting not allowed (resetting only) –
7 Descriptive element cannot be modified Description can never be modified
11 No status as master control Modification request without status as
master control (see P0927)
12 Key word missing –
15 Text array is not available –
17 Request cannot be processed due to operating
state
Current inverter status is not
compatible with the received request
20 Change request for a value which is between the
lower an the upper limit
There are other reasons why the
change request is not allowed; it is a
parameter with defined single values
101 Parameter number currently deactivated Dependent on inverter status
102 Response does not fit into buffer Dependent on the number of PKW
and the maximum net data length in
the drive
104 Illegal parameter value Parameter permits only certain values
106 Request not implemented / Task not supported After request identifier 5, 10, 15
109 PKW request access timeout or number of retries
is exceeded or wait for response from CPU side.
200/201 Modified minimum/maximum not
reached/exceeded
Minimum/maximum can be further
limited in operation
204 Available access authorization does not cover
modification of parameters
–
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