ABB COMMANDER 1900 Series, User Manual, Page: 28 / 36

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