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PROFINET IO protocol
5.4.8.5
Changing the value of drive parameter ID 103 (unsuccessful)
This example shows behaviour in case where ID modification fails. PLC writes request to change ID
103 value to 0d (Acceleration Time = 0.0s, not allowed)
Table 46. Request to write the value of parameter ID 103
Request reference
Request ID
Axis Number
No. of Parameters
Attribute
No. of elements
Parameter Number
Subindex
Parameter datatype
Number of parameters
Value: HI byte
Value: LOW byte
Following table contains messages sent during unsuccessful writing value to ID 103.
Table 47. Messages sent and received during unsuccessful writing value to ID 103
Message
Operation
1
Write request
2
Write request response from drive to PLC
-
PLC waits until drive has finished processing the requested operation
3
PLC sends read request
Read request
4
response
Answer indicates an unsuccessful operation with error "Low or high limit exceeded".
Local contacts: http://drives.danfoss.com/danfoss-drives/local-contacts/
Field
0x05
0x02 = Write parameter
0x01
0x01
0x10 = Value
0x01
0x2711 (10001d)
0x0067 (103d)
0x42 = WORD
0x01
0x00
0x00
Request header
Parameter address
Parameter value
Response header
Parameter value
Contents
Data
0x05 0x02 0x01 0x01
0x10 0x01 0x27 0x11 0x00 0x67
0x42 0x01 0x00 0x00
0x05 0x82 0x01 0x01
0x44 0x01 0x00 0x02
vacon • 45
5
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