25-91 Manual Alternation
Option:
Function:
[0]
*
0 = Off - Number of
Pumps
This parameter is only active if the options
At Command
or
At
Stating or Command
are selected in
Lead Pump Alternation
, par.
25-50.
The parameter is for manually setting of what pump to be as-
signed as variable speed pump. The default value of Manual
Alternation is
Off
[0]. If a value other than
Off
[0] is set, the
alternation is carried out immediately and the pump that is se-
lected with Manual Alternation is the new variable speed pump.
After the alternation has been carried out, the Manual Alterna-
tion parameter is reset to
Off
[0]. If the parameter is set to the
number which equals the actual variable speed pump, the pa-
rameter will be reset to [0] immediately after.
2.22. Main Menu - Analog I/O Option MCB 109 - Group
26
2.22.1. Analog I/O Option MCB 109, 26-**
The Analog I/O Option MCB 109 extends the functionality of VLT
®
AQUA Drive FC 200 Series
frequency converters, by adding a number of additional, programmable analog inputs and outputs.
This could be especially useful in control installations where the frequency converter may be used
as decentral I/O, obviating the need for an outstation and thus reducing cost. It also gives flexibility
in project planning.
NB!
The maximum current for the analog outputs 0-10V is 1mA.
NB!
Where Live Zero Monitoring is used, it is important that any analog inputs not being
used for the frequency controller, i.e. being used as part of the Building Management
System decentral I/O, should have their Live Zero function disabled.
Terminal
Parameters Terminal
Parameters
Terminal
Parameters
Analog inputs
Analog inputs
Relays
X42/1
26-00, 26-1*
53
6-1*
Relay 1 Term
1, 2, 3
5-4*
X42/3
26-01, 26-2*
54
6-2*
Relay 2 Term
4, 5, 6
5-4*
X42/5
26-02, 26-3*
Analog outputs
Analog output
X42/7
26-4*
42
6-5*
X42/9
26-5*
X42/11
26-6*
Table 2.2: Relevant parameters
It is also possible to read the analog inputs, write to the analog outputs and control the relays,
using communication via the serial bus. In this instance, these are the relevant parameters.
2. Parameter Description
VLT
®
AQUA Drive Programming Guide
244
MG.20.O2.02 - VLT
®
is a registered Danfoss trademark
2