ABB COMMANDER 1900 Series User Manual page 28

• Maths
...5 ADVANCED CONFIGURATION LEVEL
...5.2 Set Up Maths (Average)
FUNCtN
AVErGE
INPUt
CNSt–8
PV–1
tIME
1
rSt. S rC
SEG–99
NONE
SELECt
––––––
Source
CNSt–8
Constant 8
CNSt–1
Constant 1
bLK–4
Maths block 4
bLK–1
Maths block 1
IP–6
Input 6
IP–1
Input 1
Channel 2 output
OP-2
Channel 2 output (cool)
Oc–2
Channel 2 output (heat)
Oh–2
Channel 1 output
OP-1
Channel 1 output (cool)
Oc–1
Channel 1 output (heat)
Oh–1
PV–4
Process variable 4
PV–3
Process variable 3
PFb–2
Position Feedback 2
rSP–2
Remote set point 2
2. S P–2
Local set point 2
LSP–2
Set point 2
SP–2
Process variable 2
PV–2
PFb–1
Position Feedback 1
rSP–1
Remote set point 1
2. S P–1
Local set point 1
LSP–1
Set point 1
SP–1
Process variable 1
PV–1
NONE
No source required
26
Averaging Input
Select the input variable which is to be averaged.
For description of the process variable sources, refer to
Time Scale
Set the time scale interval over which the input is to be averaged, between 1 and 1440 minutes
(24 hours).
Reset Average Source
Select the digital source required to reset the average value to the present input value.
The reset is leading edge triggered.
Return to
Select Maths Function
Arithmetic value used as multiplier/divisor or for addition/subtraction
Programmable maths blocks – see Section 5.2,
Only available if inputs are not already assigned to input functions
Heat/cool only available if control type selected
Heat/cool only available if control type selected
Process variable 3 and 4 only available if pens 3 and 4 fitted
Controller 2
Controller 1
Table 5.1 Description of Operand Sources
Table 5.1
Run
Active
Inactive
frame.
Description
Set Up Maths page
below.