CG emotron TSA Series, Instruction Manual

Page: 120 / 204

116 Functionality CG Drives & Automation, 01-5980-01r2
8.6 Logical Functions and
Timers [600]
In the “Logic&Timers” menu [600] you access comparators,
logic functions, SR flip-flops, timers, and counters, enabling
conditional signals to be programmed for control or
signalling features. This gives you the ability to compare
different signals and values in order to generate monitoring/
controlling features.
All these functions are updated in 8 milliseconds intervals.
8.6.1 Comparators [610]
The comparator function makes it possible to monitor
different internal signals and values, and to visualise (via
digital relay outputs) when a specific value or status is reached
or established. The output signals of the comparators can be
logically tied together to yield a logical output signal.
All the output signals can be programmed to the relay
outputs or used as a source for the virtual connections [560].
For each digital and analogue comparator it is possible to
apply a “Set Delay” and a “Reset Delay”; functions that could
be used to delay or extend the output signal.
Analogue Comparator Setup [611] - [614]
There are 4 analogue comparators that compare any
available analogue value with two adjustable levels. The two
levels available are “Level HI” and “Level LO”. There are also
two analogue comparator types, selected in menu
“Comparator Type”, an analogue comparator with hysteresis
and an analogue window comparator.
The analogue hysteresis type comparator uses the two
available levels to create a hysteresis for the comparator
between setting and resetting the output. This function gives
a clear difference in switching levels, which lets the process
adapt until a certain action is started. With such a hysteresis,
even an unstable analogue signal can be monitored without
getting a nervous comparator output signal. Another feature
is the possibility to get a fixed indication that a certain level
has been passed. The comparator can latch by setting “Level
LO” to a higher value than “Level HI”.
The analogue window comparator uses the two available
levels to define the window in which the analogue value
should be within for setting the comparator output.
Digital Comparator Setup [615] - [618]
There are also 4 digital comparators that compare any
available digital signals.
Setup Analogue Comparator 1 [611]
Analogue comparator 1, parameter group.
Analogue Comparator 1, Value [6111]
Selection of the analogue value for “Analogue Comparator 1”
(CA1).
The analogue comparator compares the selectable analogue
value in menu [6111] with the constant “Level HI” in menu
[6112], and the constant “Level LO” in menu [6113].
In menu Comparator Type [6114] “Hysteresis” or
“Window” can be selected. For the hysteresis function, when
the value exceeds the upper limit level high, the output signal
CA1 is set high and !A1 low. See Fig. 64. When the value
decreases below the lower limit, the output signal CA1 is set
low and !A1 high.
Fig. 64 Analogue comparator type “Hysteresis”
For the window type comparator, when the value is between
the lower and upper levels, the output signal value CA1 is set
high and !A1 low. See Fig. 65. When the value is outside the
band of lower and upper levels, the output CA1 is set low and
!A1 high.
Fig. 65 Analogue comparator type “Window”
CA1 Value [6111]
CA1 Level HI [6112]
CA1 Level LO [6113]
CA1
CA1 Level HI [6112]
CA1 Value [6111]
CA1 Level LO [6113]
AND
CA1