Micromod Micro-DCI: 53SL6000 Single Loop Controller - Manual (Page 91)

8.2.1 AI1 - Process Variable Input
This analog input signal value is compared to the
control setpoint to determine the control output
value.
Applicable parameters that may require configura-
tion changes:
Section 5.2, conF-Ai.1-(SPan, ZEro, SQrt, bASE,
dFLt).
For PV alarms:
Section 7.7, conF-cn.1-(AiX, PL1, PL2, Adb).
8.2.2 AI2 - Control Element Feedback
This is a feedback signal from the diverter circuit to
the controller that indicates the position of the final
element (e.g., valve) so that if operation transfer to
the controller becomes necessary, it will be bum-
pless.
Applicable parameters that may require configura-
tion changes:
Section 5.2, conF-Ai.2-(SPan, ZEro, SQrt, bASE,
dFLt).
8.2.3 DO1 - Computer Output Diverter
When open, the computer output path is through
the diverter circuit diode to the final element (e.g.,
valve).
Applicable parameter that may require configura-
tion change:
Section 5.6, ProG-do-inV1.
8.2.4 DO2 - Backup Output Diverter
When open, the controller output path is through
the diverter circuit diode to the final element (e.g.,
valve).
Applicable parameter that may require configura-
tion change:
Section 5.6, ProG-do-inV2.
8.2.5 DI1 - Computer Ready
This is a low active signal (0-1 V dc) that enables
the computer to drive the final element when R is
selected with the R/L push button.
Applicable parameter that may require configura-
tion change:
None.
8.2.6 DI2 - Auto Enable
This is a high active signal (4-24 V dc) that enables
the controller to drive the final element when L is
selected with the R/L push button and the controller
is in automatic. The Auto LED flashes if the A/M
push button is pressed and this signal is not 4-24 V
dc to enable auto control.
Applicable parameter that may require configura-
tion change:
None.
8.2.7 A01 - Backup Control Output
This is the 4-20 mA output signal that drives the
final control element if operation is transferred from
the computer to the controller.
Applicable parameters that may require configura-
tion changes:
Section 7.7, conF-cn.1-(oh, oL, hML, oSr, rSW,
rSV).
For control related prompts:
Section 7.7, conF-cn.1-(ir, iLr, Mr).
Sections 7.7, 9.2, 9.3, and 9.4, conF-cn.1-(Pb, tr,
td).
8.2.8 SchM Selection and Path
Connections
Analog control is implemented with the controller
default settings, control scheme 1, and SnGL (sin-
gle loop control) selected from the SchM prompt of
the cS module.
Applicable parameter that may require configura-
tion changes:
Section 7.6, ProG-cS-SchM.
Applicable path connections that are required:
ProG-cS-cS.b = Ao3.
ProG-cS-cS.d = Ai2.
ProG-cS-cS.h = di2¤ (inverted).
ProG-cS-cS.J = di1.
ProG-cS-cS.K = LG1.
ProG-LG-LG1.A = do8.
ProG-LG-LG1.M = Xor.
ProG-LG-LG3.A = rMt.
ProG-LG-LG3.M = And.
ProG-Ao-Ao3.i = SP.
ProG-do-do1.i = LG3.
ProG-do-do2.i = LG3.
ProG-do-inV1 = 0-on.
ProG-do-do8.i = LG3.
53SL6000 Instruction Manual Section 8. Eight Control Strategies
8-4