Danfoss VLT FC 102 Operating Instructions Manual page 155

VLT HVAC Low Harmonic Drive Operating In-
structions
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The text block is used to read or write texts via the data block.
7.4.7 The PKE Field
The PKE field contains two sub-fields: Parameter command and response AK, and Parameter number PNU:
Bits no. 12-15 transfer parameter commands from master to slave and return processed slave responses to the master.
Parameter commands master ⇒ slave
Bit no.
15 14 13
0 0 0
0 0 0
0 0 1
0 0 1
1 1 0
1 1 1
1 1 1
Response slave ⇒master
Bit no.
15 14 13
0 0 0
0 0 0
0 0 1
0 1 1
1 1 1
Parameter command
12
0 No command
1 Read parameter value
0 Write parameter value in RAM (word)
1 Write parameter value in RAM (double word)
1 Write parameter value in RAM and EEprom (double word)
0 Write parameter value in RAM and EEprom (word)
1 Read/write text
Response
12
0 No response
1 Parameter value transferred (word)
0 Parameter value transferred (double word)
1 Command cannot be performed
1 text transferred
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7 RS-485 Installation and Set-up
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