EQUALITY CHECK (max number = 16)
This operator checks if two analog inputs are
equal within a selectable value.
The signals must have the same physical unit
and must be generated by sensors of the same
type (4/20mA, 0/20mA or 0/10V) but they can
have different scales.
The output Q will be 1 (TRUE) when the
condition of equality is verified. If the two
signals differs of an amount greater than the allowed error then the output “Q” will be 0
(FALSE).
Parameters
Allowed error:
Corresponds to the maximum tolerance between the difference of the values AN1 and AN2.
Force output FALSE on anomaly:
If checked and in presence of the connected analog input’s anomaly (the analogue value
assumes a full scale value), the output of the block will remain at 0 (FALSE) as in the
presence of different signals.
SPEED COMPARATOR
➔
It is mandatory to employ MVx modules with fw > 3.1
This operator works as a comparator of an analog speed signal
connected coming from a Speed Control functional block.
Please refer to the “SPEED CONTROL TYPE FUNCTION BLOCKS”
section to see the behavior of these blocks
The threshold value to be entered will be in rpm unit and
must respect the limits defined by the functional block
connected to the “Speed” input.
When the input value is lower than the threshold, the output
Q will be at level 0 (FALSE).
When the input value is equal or greater than to the threshold,
the output Q will be at level 1 (TRUE).
The hysteresis used in the comparison will be the one
programmed in the Speed Control functional block connected
upstream.
Window comparator:
When the window comparator is enabled the user can choose a High Speed value and a
Low Speed value.
The output state of the speed comparator depends on the value of the speed and on its
current state. There are two possible states:
➔
OUT OF WINDOW: the output of the comparator is a logic 0 (FALSE)
➔
IN WINDOW: the output of the comparator is a logic 1 (TRUE)
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