Micromod Micro-DCI: 53SL6000 Single Loop Controller - Manual (Page 42)

selections are path connections to the control
scheme block inputs A - F.
The digital signal selections ([1] - /do8) are
available to characterizer inputs chr.b and
chr.c. These inputs are used by the charac-
terizer for the digital-to-analog (dtoA) and pro-
grammer (PrGM) modes.
The chr digital output is an indicator available
to all of the elements that follow the charac-
terizer in the digital path.
4. Math Function Block - has four analog inputs
(A-D) and two digital inputs (E and F). Each of
the four analog input parameters (Fnc.A -
Fnc.d) has the same available connection se-
lections for inputs. If Ao2 or Ao3 is selected
from the list, then the analog output register
contents are fed back as the input into the
math function block.
The digital input selections work in a manner
similar to the analog input selections: the two
digital input parameters (Fnc.E and Fnc.F)
have the same prompt list selections ([1] -
/do8). Discrete outputs do7 and do8 allow for
the looped-back digital inputs to the math func-
tion block.
The math function block analog output (Fnc) is
available for control scheme inputs (cS.A -
cS.F). The digital output (Fnc) is available for
the control scheme block inputs (cS.h - cS.L)
and the logic block inputs (LG1.A, LG1.b,
LG2.A, and LG2.b).
5. Discrete Input Logic Blocks (LG1 and LG2) -
parameter inputs to both logic blocks (LG1.A,
LG1.b, LG2.A, and LG2.b) have the same pa-
rameter prompt list selections ([1] - chr). The
outputs of both logic blocks can be accessed
by the control scheme block input parameters
(cS.h - cS.L), by the LG3.A, LG3.b, LG4.A,
and LG4.b parameters of logic blocks LG3 and
LG4, and by the do1.i - do8.i parameters of the
discrete output registers DO1 - DO8.
6. Control Scheme Block - the analog cS.A - cS.F
input parameters each have the same prompt
list (0.0 - Fnc) and the cS.h - cS.L digital input
parameters each have the same prompt list
([1] - LG2). The Ao3 register contents can be
loop-back selected by a control scheme block
analog input.
The control scheme block analog outputs are
as follows:
•
out - the calculated PID algorithm output or
value generated from the output push but-
tons.
•
PV - the process variable received on an
analog input (usually cS.A).
•
SP - the remote or local setpoint value.
•
dV - the deviation error as determined
from
the difference between the setpoint and
process variable, scaled by parameter
conF-cn.1(cn.2)-ir and biased by 50.
The digital outputs are as follows:
•
Vup - time proportional or positive three
step signal.
•
Vdn - negative three step signal.
•
PA1 - loop 1 process alarm 1.
•
PA2 - loop 1 process alarm 2.
•
SWA - is active when auto is selected with
the auto/manual push button.
•
Aut - indicates loop 1 is operating in
auto mode (use PID output).
•
SWr - is active when remote is selected
with the remote/local push button.
•
rMt - indicates loop 1 remote setpoint is
active.
•
oVtS - indicates loop 1 output tracking is
active (has priority over Aut).
•
SPtS - indicates loop 1 setpoint tracking is
active (has priority over rMt).
•
Aut.2 - indicates loop 2 is operating in auto
mode (use PID output).
•
PA1.2 - loop 2 process alarm 1.
•
PA2.2 - loop 2 process alarm 2.
It is the selected control scheme mode that
determines the operator display presentation
assignments and push button assignments.
This is denoted with all seven push buttons
shown in the control schemes illustration (four
in the center and three at the bottom of the
illustration).
There are also eleven push buttons next to the
control schemes illustration that represent op-
erator access to commonly used control mod-
ule parameters (loop 1 cn.1 parameters and
loop 2 cn.2 parameters). These parameters
are accessed via the oPEr menu. However,
they must first be enabled from the conF-oPr
Section 4. Functional Overview 53SL6000 Instruction Manual
4-3