User Manual

Programming made easy
6.3 Powerful instructions make programming easy
Easy Book
100 Manual, 03/2014, A5E02486774-AF
In FBD programming, the contact networks of LAD are represented by AND (&), OR (>=1),
and exclusive OR (x) box networks where you can specify bit values for the box inputs and
outputs. You may also connect to other logic boxes and create your own logic combinations.
After the box is placed in your network, you can drag the "Insert binary input" tool from the
"Favorites" toolbar or instruction tree and then drop it onto the input side of the box to add
more inputs. You can also right-click on the box input connector and select "Insert input".
Box inputs and output can be connected to another logic box, or you can enter a bit address
or bit symbol name for an unconnected input. When the box instruction is executed, the
current input states are applied to the binary box logic and, if true, the box output will be true.
6.3.2
Compare and Move instructions
The Compare instructions perform a comparison of two values with the same data type.
Table 6- 1 Compare instructions
Instruction
SCL
Description
LAD:
out := in1 = in2;
out := in1 <> in2;
out := in1 >= in2;
out := in1 <= in2;
out := in1 > in2;
out := in1 < in2;
• Equals (==):The comparison is true if IN1 is equal to
IN2
• Not equal (<>):The comparison is true if IN1 is not
equal to IN2
• Greater than or equal to (>=):The comparison is true if
IN1 is greater than or equal to IN2
• Less than or equal to (<=):The comparison is true if
IN1 is less than or equal to IN2
• Greater than (>):The comparison is true if IN1 is
greater than IN2
• Less than (<):The comparison is true if IN1 is less
than IN2
FBD:
1
For LAD and FBD: The contact is activated (LAD) or the box output is TRUE (FBD) if the comparison is TRUE,
The Move instructions copy data elements to a new memory address and can convert from
one data type to another. The source data is not changed by the move process.
● MOVE copies a data element stored at a specified address to a new address. To add
another output, click the icon next to the OUT1 parameter.
● MOVE_BLK (interruptible move) and UMOVE_BLK (uninterruptible move) copy a block of
data elements to a new address. The MOVE_BLK and UMOVE_BLK instructions have an
additional COUNT parameter. The COUNT specifies how many data elements are
copied. The number of bytes per element copied depends on the data type assigned to
the IN and OUT parameter tag names in the PLC tag table.