Siemens 6RA7086-6KS22 Operating Instructions Manual page 207

05.05
The consistency of a block of data words is guaranteed within a DeviceNet I/O message
connection even in cases where more than 4 PZD words are used and the transmission data is
distributed among several telegrams. The data are not transferred from the CBD to the drive until
all data words have been received.
PKW object (parameter data)
The manufacturer-specific PKW object (class 100) is used to read and modify parameters of the
drive or a technology board by means of the DeviceNet master (PKW = parameter identifier value).
Explicit messaging mode is used for this purpose.
Only two instances are implemented for the PKW object: Instance 0 permits access to class
attributes and instance 1 (always set to "1") access to all parameter numbers (see DeviceNet
objects below).
Apart from the protocol header and trailer specific to DeviceNet, the structure of a telegram is
follows:
Parameter identifier
For details about this telegram area, see also Section 7.7.9, Structure of request/response
telegrams. The useful data area of PROFIBUS, CAN Bus and DeviceNet telegrams is structured
identically.
DeviceNet GET Single
This object is used to read parameter values and 9 bytes in length.
Byte
1
2
3
4
5
6
7
8
9
DeviceNet SET Single
This object is used to modify parameter values and 14 bytes in length
Byte
1
2
3
4
5
6
7
8
9
10
11
12
13
14
SIEMENS AG 6RX1700-0AD76
SIMOREG DC Master Operating Instructions
Parameter index
PKE IND
DeviceNet identification
[FRAG] [XID] [SRC/DST MAC ID]
[R/R] [Service]
Class
Instance
Attribute
PKE
IND
DeviceNet identification
[FRAG] [XID] [SRC/DST MAC ID]
[Fragmentation Protocol]
[R/R] [Service]
Class
Instance
Attribute
PKE
IND
PWE1
PWE2
Parameter value1 Parameter value2
PWE1
0x0E [Get_Attribute_Single]
100 [PKW object] manufacturer-specific
1 [Instance number] always set to 1
1 [Attribute number] always set to 1
Parameter ID, L byte
Parameter ID, H byte
Parameter index, L byte
Parameter index, H byte
0x10 [Set_Attribute_Single]
100 [PKW object] manufacturer-specific
1 [Instance number] always set to 1
1 [Attribute number] always set to 1
Parameter ID, L byte
Parameter ID, H byte
Parameter index, L byte
Parameter index, H byte
Parameter value, L word, L byte
Parameter value, L word, H byte
Parameter value, H word, L byte
Parameter value, H word, H byte
Start-Up
PWE2
7-49