Programming IDEC SmartRelay
60 IDEC SmartRelay Manual
3.2 Blocks and block numbers
This chapter shows you how to use IDEC SmartRelay
elements to create complex circuits and how blocks and I/O
are interconnected.
In Chapter 3.3 you will learn how to transform a conventional
circuit into an IDEC SmartRelay circuit program.
Blocks
A block in IDEC SmartRelay represents a function that is
used
to convert input information into output information.
Previously you had to wire the individual elements in a
control cabinet or terminal box.
When you create the circuit pr
ogram, you in
terconnect the
blocks. To do so, simply select the connection you require
from the Co menu. The menu name Co is an abbreviation of
the term “Connector”.
Logic operations
The most elementary blocks are the logic operations:
•AND
•OR
• ...
Inputs I1 and I2 are here connected to the
OR block. The last two inputs of the block
remain unused and are identified by the
creator of the circuit program with an ‘x’.
These special functions offer you significantly greater
performance:
• Current impulse relay
• Up/down counter
•On-delay
• Softkey
• ...
Chapter 4 gives a full list of the IDEC SmartRelay functions.
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