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7.4 Signal Paths for the SnGL, cASc,
L.LiM, and h.LiM Control
Schemes
Figure 7-3 is a graphical representation of the con-
trol scheme block as it applies to the SnGL, cASc,
L.LiM, and h.LiM control schemes. The hexagons
in the figure are the control signal outputs from
Figure 7-2. They enable analog signal switch
paths that affect operation of the control scheme.
Other analog signal switches are controlled by the
conF-cn.1(cn.2) module parameters, which are de-
picted as circled inputs; and the ProG-cS module
parameters, which are depicted as diamond inputs.
Figure 7-3 contains both, the cn.1 and cn.2 control
loop modules. The upper half of the diagram is for
cn.2 and the lower half is for cn.1. Each half con-
tains three distinct functional areas:
1.
Setpoint Generator with Deviation Calculator
(SP-PV) - It controls setpoint selection (local
push buttons, remote setpoint [cn.1 only], or
setpoint tracking) and applies the setpoint
high/low limits and setpoint slew rate. It calcu-
lates the deviation (SP-PV) to determine the
error value that is passed on to the PID after
control zone modification. It generates proc-
ess or deviation alarms, and also drives the
setpoint display bar, setpoint dro, PV display
bar, and PV dro.
2.
PID - It uses the deviation and process vari-
able values as determined by direct or reverse
control action to apply the proportional, inte-
gral, and derivative actions; and augments the
result with any additive feed forward (input).
The integral term allows both, internal and ex-
ternal E input feedback paths. Finally, it ap-
plies the output high/low limits to the result.
3.
Auto/Manual Output Selector (OUT) - It allows
the control output (out) to be selected from one
of the three sources: PID result, output push
buttons, or output tracking (D input). It also
applies the output high/low limits when indi-
cated by the conF-cn.1(cn.2)-hML parameter
to the final result. Both, an analog (out) and
dual digital (VuP, Vdn) output are provided.
The cn.1 and cn.2 modules are very similar; how-
ever, cn.1 also has the conF-cn.1-SPM (setpoint
mode) path enable parameter. Its purpose is to
select between the ratio (K-SP) and standard (Std)
setpoints.
7.4.1 Setpoint (SP-PV) Paths for the
SnGL, cASc, L.LiM, and h.LiM
Control Schemes
The control scheme setpoint (SP-PV) paths are
depicted in Figures 7-4 through 7-9. These figures
are partials of Figure 7-3. Unless specifically re-
quired by the example (e.g., SPM = K-SP, for the
remote ratio setpoint example in Figure 7-6), the
parameter path settings are arbitrary (e.g., SPM
can be set for standard [Std] or ratio [K-SP] set-
point in the other examples). The control scheme
setpoint path figures are as follows:
• Figure 7-4. Common Setpoint Path Logic
• Figure 7-5. Local Standard (Std) Setpoint
Path
• Figure 7-6. Remote Ratio Setpoint Path
• Figure 7-7. STV Setpoint Tracking
• Figure 7-8. PVT Setpoint Tracking
• Figure 7-9. cASc Control Scheme Setpoint
Path
7.4.2 PID Paths for the SnGL, cASc,
L.LiM, and h.LiM Control
Schemes
The control scheme PID paths are depicted in Fig-
ures 7-10 through 7-12. These figures are partials
of Figure 7-3. Unless specifically required by the
example, the parameter path settings are arbitrary
(e.g., rSW can be set for direct [dir] or reverse
[rEV]). The control scheme PID path figures are
as follows:
• Figure 7-10. Pb, td, and tr PID Paths
• Figure 7-11. Pb, td, tr, and FF PID Paths
• Figure 7-12. Pb, td, tr, and FF PID Paths with
EXrF
7.4.3 OUT Paths for the SnGL, cASc,
L.LiM, and h.LiM Control
Schemes
The control scheme OUT paths are depicted in
Figures 7-13 through 7-16. These figures are par-
tials of Figure 7-3. Unless specifically required by
the example, the parameter path settings are arbi-
trary (e.g., rSV can be set for direct [dir] or reverse
[rEV]). The control scheme OUT path figures are
as follows:
• Figure 7-13. Output Tracking Path
• Figure 7-14. Auto Output Path
53SL6000 Instruction Manual Section 7. Control Scheme Block
7-6
- INSTRUCTION MANUAL 1
- MicroMod Automation, Inc 2
- Table of Contents 3
- 4.0 Functional Overview 4-1 4
- 5.0 Inputs/Outputs (I/O) 5-1 4
- 9.0 Commissioning 9-1 6
- Appendix A: Glossary A-1 7
- Appendix D: Prompt List D-1 7
- List of Tables 8
- List of Figures 9
- Safety Summary 11
- READ FIRST 12
- 1.0 Introduction 13
- 1.2 Controller Model Numbers 15
- 1.3 Product Specifications 15
- Thermocouple List 18
- 2DI/2DO Option Module 18
- CPU Cycle Time 19
- Control Ranges 19
- 2.1 Inspection 20
- 2.2 Site Location 20
- 2.3 Panel Mounting 20
- 2.4 Power Connections 20
- 2.5 Signal Connections 22
- 2.5.4 Analog Output AO1 23
- Signal Wiring 24
- 2.7 2DI/2DO Module 25
- 2.9 Applying Power 26
- 2.9.1 Power-up Sequence 27
- 3.0 Display Panel 28
- 3.4 Operator Mode Overflow/ 31
- Underflow Indication 31
- 3.5 Engineer Mode 32
- Backward 33
- 3.6 Entering a Pass-Key 35
- 3.7 Offline Display Pattern 35
- 3.9 Display Alphanumerics 38
- 3.10 Engineer Mode Summary 38
- 4.0 Functional Overview 40
- 4.2 Detailed Block Diagram 41
- 5.0 Inputs/Outputs (I/O) 45
- Parameter Entries 46
- Table 5-6. RTD Types 47
- 5.4 Analog Output 1 (AO1) 48
- 5.5 Discrete Inputs 49
- 5.6 Discrete Outputs 49
- 6.1 Section Overview 51
- 6.2 Characterizer 51
- 6.2.1. 3SEG Mode 52
- 6.2.2 LSEG Mode 52
- 6.2.3 PrGM Mode 53
- 6.3 Math Function Block 54
- 6.3.1 ALG Mode 55
- 6.3.2 SuMM Mode 55
- 6.3.3 PoLY Mode 56
- 6.3.4 PoWr Mode 56
- 6.3.5 LoG Mode 56
- 6.3.6 LiM Mode 56
- 57
- 7.0 Control Scheme Block 59
- Schemes 64
- Control Scheme 65
- 7.7 Control Loop Parameters 83
- 7.8 Control Scheme Signal 86
- 8.0 Eight Control Strategies 88
- 8.2 Analog Back-Up Control 90
- 8.3 Ratio Control 92
- 8.4 Auto/Manual Selector 94
- Out 95
- 8.4.8 SchM Selection 95
- 8.5.2 AI2 - Primary PV Input 96
- 8.6.1 AI1 - Primary PV Input 98
- 8.7 Dual Indicator with 100
- Re-Transmitted PV 100
- Control 101
- 8.8.3 Speed Factor Adjusting 103
- 9.0 Commissioning 104
- 9.8 Easy-Tune 106
- Actual Curve 107
- Approximated Curve 107
- 9.8.1 Executing Easy-Tune 108
- Appendix A: Glossary 112
- B.1 Overview 118
- B.2 Parts List 118
- B.3 Removal and Replacement 119
- Procedure 120
- B.5 Defaulting the Database 123
- B.6 Analog Input/Output 123
- Calibration Values 123
- B.7 Watchdog LED 123
- C.1 Overview 124
- C.2 Configuring the System 124
- Module for Datalink 124
- C.3 Protocol 124
- C.3.1 Message Types 125
- C.3.2 Transaction Examples 125
- Reference 126
- Cross Reference 128
- Reference 129
- via Datalink 131
- Appendix D: Prompt List 132
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