IDEC SmartRelay functions
IDEC SmartRelay Manual 122
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 of count, for example.
• En (Enable): 
This input enables a block function. When this input is “0”, 
other signal to the block will be ignored.
• Inv (Invert): 
A signal at this input inverts the output signal of the block.
• Ral (Reset all): 
All internal values are reset.
Connector X at SF inputs
SF inputs connected to connector x are set low. That is, the 
inputs carry a ‘lo’ signal.
Parameter inputs
At some of the inputs you do not apply any signals. You con-
figure the relevant block values instead. Examples:
• Par (Parameter): 
This input will not be connected. Here, you set the rele-
vant block parameters (times, on/off thresholds etc.). 
• No (Cam): 
This input will not be connected. Here, you configure the 
time patterns.
• P (Priority): 
This is an open input. Here, you define priorities and spec-
ify whether a message is to be acknowledged in RUN.
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