If the command cannot be performed, the follower sends
0111 Command cannot be performed
response and issues the following
fault reports in the following table.
Table 55: Follower Report
Fault code
FC specification
0
Illegal parameter number.
1
Parameter cannot be changed
2
Upper or lower limit is exceeded.
3
Subindex is corrupted.
4
No array.
5
Wrong data type.
6
Not used.
7
Not used.
9
Description element is not available.
11
No parameter write access.
15
No text available.
17
Not applicable while running.
18
Other errors.
100
–
>100
–
130
No bus access for this parameter.
131
Write to factory set-up is not possible.
132
No LCP access.
252
Unknown viewer.
253
Request is not supported.
254
Unknown attribute.
255
No error.
8.4.8 Parameter Number (PNU)
Bits 0–11 transfer parameter numbers. The function of the relevant parameter is defined in the parameter description in the VLT®
Flow Drive FC 111 Programming Guide.
8.4.9 Index (IND)
The index is used with the parameter number to read/ write access parameters with an index, for example,
parameter 15-30 Alarm
Log: Error Code
. The index consists of 2 bytes: a low byte and a high byte. Only the low byte is used as an index.
8.4.10 Parameter Value (PWE)
The parameter value block consists of 2 words (4 bytes), and the value depends on the defined command (AK). The master prompts
for a parameter value when the PWE block contains no value. To change a parameter value (write), write the new value in the PWE
block and send from the master to the follower.
AJ363928382091en-000101 / 130R0983
108 | Danfoss A/S © 2021.04
RS485 Installation and Set-up
VLT® Flow Drive FC 111
Design Guide