Menu 12: Threshold Detectors And Variable Selectors; Menu 12 Logic Diagram - Emerson SP1201 Installation Manual

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Introduction
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9.12

Menu 12: Threshold detectors and variable selectors

Menu 12 includes two threshold detectors which produce logic signals depending on the level of a variable value with respect to a threshold, and two
variable selectors which allow two input parameters to be selected or combined to produce a variable output. One menu 9 or one menu 12 function is
executed every 4ms. Therefore the sample time of these functions is 4ms x number of menu 9 and 12 functions active. A function is active if one or
more sources are routed to a valid parameter.
Figure 9-9 Menu 12 logic diagram
Threshold
Detector 1
Any variable
parameter
??.??
??.??
Threshold
Detector 2
Any variable
parameter
??.??
??.??
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Threshold
Detector 1
threshold level
12.04
Threshold
Detector 1
12.03 12.05
Threshold Threshold
Detector 1 Detector 1
input source hysteresis
Threshold
Detector 2
threshold level
12.24
Threshold
Detector 2
12.23 12.25
Threshold
Threshold
Detector 2
Detector 2
hysteresis
input source
Key
Input
Read-write (RW)
0.XX
terminals
parameter
Read-only (RO)
Output
0.XX
parameter
terminals
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Threshold Threshold
Detector 1
Detector
output indicator
output
destination
parameter
12.01
12.07
x(-1)
12.06
Threshold
Detector 1
output invert
Threshold Threshold
Detector 2 Detector
output indicator output
destination
parameter
12.02
12.27
x(-1)
12.26
All parameters are shown
at their default setting
Threshold
Detector 2
output invert
Threshold
level
Threshold
output
Technical Component
Parameters
data sizing
1
Any
unprotected
bit parameter
??.??
??.??
2
Any
unprotected
bit parameter
??.??
??.??
Hysteresis
t
t
Diagnostics
165