Special Functions; Designation Of The Inputs - IDEC SMARTRELAY User Manual

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. Special 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 Special functions list - SF (Page 127).
4.3.1

Designation of the inputs

Logical inputs
The following connectors enable you 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 triggers the start of a function.
•
Cnt (Count):
This input counts pulses.
•
Fre (Frequency):
IDEC SmartRelay applies frequency signals to be evaluated to this input.
•
Dir (Direction):
This input determines the direction, + or -.
•
En (Enable):
This input enables a block function. When this input is "0", the block ignores all other
signals.
•
Inv (Invert):
A signal at this input inverts the output signal of the block.
•
Ral (Reset all):
A signal at this input resets all internal values.
•
Lap (for the stopwatch function)
A signal at this input pauses the stopwatch.
Note
Unused logical inputs of special functions default to logical "0".
Connector X at SF inputs
The connector "x" input for any SF input is low. That is, the input carries a "lo" signal.
IDEC SmartRelay Manual
Phone: 800.894.0412 - Fax: 888.723.4773 - Web: www.clrwtr.com - Email: info@clrwtr.com
IDEC SmartRelay functions
4.3 Special functions
123