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.
Parameter command
15
14
13
12
0
0
0
0
No command
0
0
0
1
Read parameter value
0
0
1
0
Write parameter value in RAM (word)
0
0
1
1
Write parameter value in RAM (double word)
1
1
0
1
Write parameter value in RAM and EEprom (double word)
1
1
1
0
Write parameter value in RAM and EEprom (word)
1
1
1
1
Read/write text
Response slave
⇒
master
Bit no.
Response
15
14
13
12
0
0
0
0
No response
0
0
0
1
Parameter value transferred (word)
0
0
1
0
Parameter value transferred (double word)
0
1
1
1
Command cannot be performed
1
1
1
1
text transferred
If the command cannot be performed, the slave sends this response:
0111 Command cannot be performed
- and issues the following fault report in the parameter value (PWE):
VLT
®
HVAC Drive Design Guide
7. RS-485 Installation and Set-up
MG.11.B2.02 - VLT
®
is a registered Danfoss trademark
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