VACON CX Profibus user’s manual Page 13
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Vacon Oyj Phone +358-201-2121 Fax: +358-201-212 205
ID
ID byte1 ID byte2
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
Request/Response type SM Parameter Number
SM: Spontaneous bit (not used)
Request/Response types
Request Function Response Function
0 No request 0 No response
1 Read parameter value (word) 1 Parameter value ready (word)
2 Write parameter value (word) 7 Request rejected (+fault code)
Fault Number (if response = 7)
Fault Number Description
0 Illegal Parameter
1 Parameter is read only ( e.g. actual values)
2 Parameter value is out of limits
17 Request temporarily rejected (e.g. can be changed only for STOP state)
18 Other fault
101 Unknown request type
Example1, (PPO1 mode):
Read parameter number 102 (Par 1.2).
Start frequency converter and set speed reference 50,00%.
Command Master - Slave:
ID 1066 hex 1 - Read parameter value
066 - Parameter 102 (= Maximum frequency )
IND 0000 hex 0000 - No meaning
VALUE 0000 0000 hex 0000 0000 - No meaning
CW 047F hex 04 7F- Start command (see chapter control word and state machine)
REF 1388 hex Speed ref. 50,00% (= 25,00 Hz if parameter min. frequency 0 Hz and
max. frequency 50 Hz)
PPO1 frame:
10 66 00 00 00 00 00 00 04 7F 13 88
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