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SC Series Controllers
Embedded PLC
Instructions
Description
Use the XIO instruction in the ladder program to determine if a bit is off. When the instruction
is executed, if the bit addressed is off (0), then the instruction is evaluated as true. When the
instruction is executed, if the bit addressed is on (1), then the instruction is evaluated as
false.
XOR
Exclusive Or
Performs a bit-by-bit logical Exclusive Or. The operation is performed using the value at
source A and the value at source B. The result is stored in the destination.
9.2
PLC editor
Use the PLC editor provided in Alpha Toolbox to create and edit ladder logic files. "See Chapter Alpha toolbox
ethernet connector [} 22]" to know how to connect the controller to a computer.
To get to the PLC Editor in SC controller navigate to the Setup/PLC and click on the Palette button.
9.2.1
Palette
Under Setup card header -> Select PLC Card-> Select Palette
The Add Branch button adds a branch to the rung or around an instruction.
The List of Instruction buttons add the instruction to the ladder logic. Use the mouse to click, hold and drag the
instruction to the desired spot on the ladder. When an instruction starts moving Add Points appear to show all
the available places to add the instruction on the ladder. Or click on a branch or other instruction in the ladder
and then click an instruction button in the list of instructions to add to the ladder.
To removes the last item or action just drag the instruction out of the box.
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