Micromod Micro-DCI: 53SL6000 Single Loop Controller - Manual (Page 51)

6.1 Section Overview
Signal modification includes the altering, adjusting,
selecting, or limiting of the analog input signal val-
ues and digital input values. Modification affects
the numeric value and not the electrical charac-
terisitcs, which are conditioned prior to being
loaded into the analog input registers or digital reg-
ister.
Signal modifications are performed by the charac-
terizer, the math function block, and/or the digital
logic blocks. These elements are shown in the
detailed controller block diagram, illustrated in Fig-
ure 4-2.
6.2 Characterizer
As shown below, the characterizer is depicted as a
five pin plugable module. As such, it can be desig-
nated with its chr.A path selection parameters to
intercept and act upon any one of the four function
generator analog inputs (Fnc.A - Fnc.d), or any
one of the control scheme’s six analog inputs (cS.A
- cS.F). Two additional digital inputs, selectors
chr.b and chr.c, are used in the characterizer to
activate or trigger actions based on logic values.
Two outputs, one analog and the other digital, pro-
duce values based on the mode of operation se-
lected by the chr.M parameter and the K1-K26
constants.
Table 6-1 is a summary of the connection parame-
ters and the assigned applications for constants
K1-K26 by operating mode. Detailed descriptions
of the characterizer operating modes (third order
polynomial, linear segments mode, setpoint pro-
grammer, and digital-to-analog converter) are pro-
vided in the sections that follow.
Table 6-1. Characterizer Parameters
(ProG Menu → chr Module)
Prompt Description Dft
chr.M Characterizer Mode Select
This parameter is used to select how
an analog input is characterized
before it is passed-on to the math
function block for further augmenting
or the control scheme. Characterizer
mode selections are as follows:
oFF: No characterization
performed.
3SEG: Third order polynomial.
LSEG: Linear segments mode.
PGrM: Setpoint programmer.
dtoA: Digital-to-analog conversion. oFF
chr.A Characterizer Position Select
Specifies the characterizer
connection point at the math
function block or control scheme.
Selections are as follows:
oFF: The characterizer is not used.
Fnc.A: Function module A input.
Fnc.b: Function module B input.
Fnc.c: Function module C input.
Fnc.d: Function module D input.
cS.A: Control scheme A input.
cS.b: Control scheme B input.
cS.c: Control scheme C input.
cS.d: Control scheme D input.
cS.E: Control scheme E input.
cS.F: Control scheme F input. oFF
chr.b
chr.c Characterizer b and c Inputs
Specifies connections to the
characterizer b and c inputs.
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)
6.0 Signal Value Modification
Section 6. Signal Value Modification 53SL6000 Instruction Bulletin
6-1