Micromod Micro-DCI: 53SL6000 Single Loop Controller - Manual (Page 55)

Table 6-2. Math Function Block Parameters
(ProG Menu → Fnc Module)
Prompt Description Dft
Fnc.M Math Function Block Mode Select
This mode parameter is used to
select the function to be performed
on the inputs of the math function
block. Function selections are as
follows:
oFF: No functions selected.
ALG:
Algebraic.
SuMM: Summation.
PoLY Polynomial.
PoWr Exponential.
LoG: Logarithmic.
LiM: Limiting.
SEL: Four Signal Selector.
LFLo:
Linear Flow.
SFLo: Square Root Flow.
oFF
Fnc.A
Fnc.b
Fnc.c
Fnc.d
Math Function Block Analog Inputs
A-D
Specifies a connection to the
analog A - D inputs of the math
function block. Selections are as
follows:
1.0: A constant value input of 1.0.
0.0: A constant value input of 0.0.
Ai1: The standard analog input 1
value or a constant value
previously loaded into the Ai1
register. 1.0
1.0
1.0
1.0
Ai2: The standard analog input 2
value or a constant value
previously loaded into the Ai2
register.
Ai3: The optional analog input 3
value or a constant value
previously loaded into the Ai3
register.
Ai4: The optional analog input 4
value or a constant value
previously loaded into the Ai4
register.
Ai5: A constant value previously
loaded into this register.
Ai6: A constant value previously
loaded into this register.
Ai7: A constant value previously
loaded into this register.
Ai8: A constant value previously
loaded into this register.
Ao2: Loop-back Ao2 register value.
Ao3: Loop-back Ao3 register value.
Table 6-2. Math Function Block Parameters
(ProG Menu → Fnc Module)
Prompt Description Dft
Fnc.E
Fnc.F Math Function Block Digital Inputs
E and F
Specifies connections to the digital
inputs E and F of the math function
block. Selections are as follows:
[1]: Logical one input.
[0]: Logical zero input.
di1: Discrete input 1 logic value.
/di1: Inverted di1 logic value.
di2: Discrete input 2 logic value.
/di2: Inverted di2 logic value.
di3: Discrete input 3 logic value.
/di3: Inverted di3 logic value.
di4: Discrete input 4 logic value.
/di4: Inverted di4 logic value.
di5: Discrete input 5 logic value.
/di5: Inverted di5 logic value.
di6: Discrete input 6 logic value.
/di6: Inverted di6 logic value.
di7: Discrete input 7 logic value.
/di7: Inverted di7 logic value.
di8: Discrete input 8 logic value.
/di8: Inverted di8 logic value.
do7: Loop-back do7 register value.
/d07: Inverted loop-back do7
register value.
d08: Loop-back do8 register value.
/d08: Inverted loop-back do8
register value. [1]
[1]
K01 -
K06
K01 through K06 are the formula
constants of the math function
block. Valid input values for K01
through K06 are -999 to 9999. 0.0
6.3.1 ALG Mode
The basic algebraic functions (additon, subtraction,
multiplication, and division), as well as limited com-
binations of them, are provided by this equation.
The constants K1 through K6 provide a means of
scaling the four analog inputs if required.
X =
( A + K1 ) ( B + K 2 )
C + K3
K4 + K5 D + K6
6.3.2 SuMM Mode
The summer allows up to three inputs to be com-
bined into a single multi-component value which
may be further modified (multiplicative) by the
fourth input. The constants K1 through K6 allow
the individual inputs to be scaled to the proper
relationship for combining.
X = ( K1 A + K2 B + K3 C + K4 ) ( K5 D + K6 )
Section 6. Signal Value Modification 53SL6000 Instruction Bulletin
6-5