Siemens SIMOTRAS 6SG7050, Руководство по эксплуатации

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01.04 Start-up
SIEMENS AG 6SG7000-0BA76
7-39
SIMOTRAS HD Operating Instructions
Two CAN identifiers are required for the purpose of processing parameters, i.e. one CAN identifier
for PKW Request (parameter request job to drive) and one CAN identifier for PKW Response
(parameter response by drive). These assignments are made in CB parameters as shown in the
following diagram:
x2
+
+1
Node address
of drive (P918)
Basic identifier for
parameterizing (U711)
PKW Request
PKW Response
Example of PKW data exchange:
P918 = 1 This setting assigns identifier 300 to the parameter job (request)
U711 = 298 and identifier 301 to the parameter response.
Structure of a telegram for PKW data exchange:
The telegram consists of the following data words:
Identifier
ID
Parameter identifier
PKE
Parameter index
IND
Parameter value 1
PWE1
Parameter value 2
PWE2
ID is the CAN identifier that is defined for the COB in question by parameterization.
PKE contains the request or response ID and the parameter number
Request or response ID Parameter number
PNU
Bit 0 to bit 10 contain the number of the parameter concerned. Bit 12 to bit 15 contain the
request or response ID.
The index IND contains the value 0 for unindexed parameters, for indexed parameters it
contains the corresponding index value. Bit15 also has a special function as the page select
bit for parameter numbers greater than 1999.
The index value 255 means that the request concerns all indices of the parameter in
question. For a change request, the parameter values must then be passed on for all indices
of the parameter. Because a COB can only contain up to 4 data words (8 bytes) of net data,
use of this request is only possible for parameters with (up to ) 2 indices. In the other
direction, the drive supplies all index values in the response telegram to a read request.
Details about the telegram structure can be found in Section 7.10.7, "Structure of
request/response telegrams“.
Example of a PKW request:
Changing the parameter value of the indexed parameter P301.02 (in the RAM) to -95.00%.
The example telegram therefore contains the following values:
Request identifier 300
d
012C
h
For use of the IDs of the example above
Request code 7
d
7
h
"Change parameter value (array word)"
Parameter number 301
d
012D
h
=> PKE = 712D
h
Index 2
d
0002
h
Parameter value 9500
d
DAE4
h