TR-Electronic MP Series - Examples of Access to Parameters Via Acyclic Data Exchange; Write Command: Write P930 with Value 2

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06/06/2019 TR - EMO - BA - DGB - 0019 - 08 Page 161 of 252
5.4.1 Examples of access to parameters via acyclic data exchange
5.4.1.1 Write command: Write P930 with value 2
The control wants to write parameter 930 "Operating mode" with value 2:
Request IO-Controller => encoTRive:
Byte
Value
Meaning
0
0xAB
Request Reference
1
0x02
Request ID (write parameter)
2
0x00
Axis (content not relevant)
3
0x01
Number of parameter (always 1)
4
0x10
Attribute (access to value)
5
0x00
Number of elements (simple parameter)
6
0x03
PNU (High Byte)
7
0xA2
PNU (Low Byte)
8
0x00
Subindex (High Byte)
9
0x00
Subindex (Low Byte)
10
0x42
Format (Word)
11
0x01
Number of values
12
0x00
Value (High Byte)
13
0x02
Value (Low Byte)
Response encoTRive => IO-Controller:
a) If executed successfully:
Byte
Value
Meaning
0
0xAB
Request reference (mirrored from request)
1
0x02
Response ID (parameter written successfully)
2
0x00
Axis (mirrored from request)
3
0x01
Number of parameters (mirrored from request)
b) In the event of failure:
The error number is assumed to be 0x1234
Byte
Value
Meaning
0
0xAB
Request reference (mirrored from request)
1
0x82
Response ID (error when writing parameter)
2
0x00
Axis (mirrored from request)
3
0x01
Number of parameters (mirrored from request)
4
0x44
Format (error)
5
0x01
Number of values
6
0x12
Error number (High Byte)
7
0x34
Error number (Low Byte)