Bit 10, Data invalid/valid
Is used to tell the adjustable frequency drive whether the control word is to be used or ignored. Bit 10 = “0” causes the control word to be ignored, Bit
10 = “1” causes the control word to be used. This function is relevant, because the control word is always contained in the message, regardless of which
type of message is used, i.e., it is possible to turn off the control word if you do not wish to use it in connection with updating or reading parameters.
Bit 11, No function/Slow-down
Is used to reduce the speed reference value by the amount given in par. 3-12
Catch up/slow-down Value
value. When bit 11 = "0", no modification of
the reference value occurs. When bit 11 = "1", the reference value is reduced.
Bit 12, No function/Catch up
Is used to increase the speed reference value by the amount given in par. 3-12
Catch up/slow-down Value
.
When bit 12 = "0", no modification of the reference value occurs.
When bit 12 = "1", the reference value is increased.
If both - slowing down and accelerating - are activated (bit 11 and 12 = "1"), slowing down has priority, i.e., the speed reference value will be reduced.
Bits 13/14, Set-up selection
Bits 13 and 14 are used to choose between the four parameter set-ups
according to the following table:
The function is only possible if
Multi Set-up
has been chosen in
par. 0-10
Active Set-up
. The selection in par. 8-55
Set-up Select
deter-
mines how bits 13 and 14 are linked with the corresponding function of
the digital inputs. Changing set-up while running is only possible if the
set-ups have been linked in par. 0-12
This Set-up Linked to
.
Set-up
Bit 13
Bit 14
1
0
0
2
1
0
3
0
1
4
1
1
Bit 15, No function/Reverse
Bit 15 = “0” causes no reversing.
Bit 15 = “1” causes reversing.
Note: In the factory setting reversing is set to
digital
in par. 8-54
Reverse Select
.
NOTE!
Bit 15 causes reversing only when
Ser. communication, Logic or
or
Logic
and is selected.
11 RS-485 Installation and Set-up
FC 300 Design Guide
11-26
MG.33.BC.22 - VLT
®
is a registered Danfoss trademark
11