IDEC SmartRelay functions
IDEC SmartRelay Manual
121
4.3 Special functions
Because of their different input designation, you can see
right away that there is a difference between the special
functions and basic functions. SFs contain timer functions,
retentive functions and various parameter assignment
options, which allow you to adapt the circuit program to suit
your own requirements.
This section provides you with a brief overview of input
designations and with some particular background
information on SFs. The SFs in particular are described in
Chapter 4.4.
4.3.1
Designation of the inputs
Logical inputs
Here, you will find the description of the connectors you can
use to create a logical link to other blocks or to the inputs of
the IDEC SmartRelay unit.
•
S (Set):
A signal at input S sets the output to logical “1”.
•
R (Reset):
The reset input R takes priority over all other inputs and
resets the outputs.
•
Trg (Trigger):
This input is used to trigger the start of a function.
•
Cnt (Count):
This input is used for counting pulses.
•
Fre (Frequency):
Frequency signals to be evaluated are applied to this
input.
•
Dir (Direction):
This input determines the direction, + or -.
•
En (Enable):
This input enables a block function. When this input is ”0”,
other signals to the block will be ignored.
•
Inv (Invert):
A signal at this input is inverted.
•
Ral (Reset all):
All internal values are reset.
Note
Unused logical inputs of special functions default to logical "0".
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