Mitsubishi MELSEC System Q Manual page 159

More Advanced Programming
An ADD instruction is not restricted to two input variables. Up to 28 input variables can be
defined. In the Ladder Diagram this can be done as follows:
When programming in IEC instruction list just enter the ADD instruction several times. For
example:
LD
ADD
ADD
ADD
ST
MELSEC System Q Beginners Manual
Select the ADD-E instruction from the Function Block Selec-
tion window (see chapter 4.7.7) and place the instruction into
the body of the POU.
Click on the instruction. This changes the colour of the box.
Move the cursor downward until he converts into a double
arrow.
Then click the left mouse button and "Click – Drag" downward
until the desired number of input variables is displayed. Release
the left mouse button at this point
D1
24 D1
97
D2
D3
D4
D2
+ + 13
24
Math Instructions
D3 D4
+ 243 377
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