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Chapter 4. Functions
The device is capable of logical operations (Boolean operations using 0 and 1) for a wide range of device states, and
the logical operation results can be used as ON/OFF outputs or internal contact inputs.
32 groups of logical operations are provided, each with four inputs and one output.
Four types of logical operations are available, and the input or output logic can be inverted.
4 types of logical operation
Input assignment A Input assignment B Input assignment C Input assignment D
Input bit attribute Input bit attribute Input bit attribute Input bit attribute
1. (A and B) or (C and D)
2. (A or B) and (C or D)
3. A or B or C or D
4. A and B and C and D
Reverse
ON-delay
OFF-delay
Logical operation result

Processing order for logical operations
Logical operation results can be used as inputs for logical operations. Logical
operation results and the inputs in which the results are used can be in the same
group or a different group.
Logical operations are executed in the order of group numbers for each cycle.
Therefore, the logical operation results of a group with a smaller number than
the group number of the logical operation can be used in the same cycle. Logical
operation results in the same group or a group with a larger number are used in the
next cycle.
Note
• Logical operation groups 1 to 16 are executed before PID calculation, and logical
operation groups 17 to 32 are executed after PID calculation.
Handling Precautions
• If the version of the MAIN block firmware is earlier than 6.x.x (where x stands
for any number), 16 logical operation groups are available, and logical
operation groups 1 to 4 are executed before PID calculation, and logical
operation groups 5 to 16 are executed after PID calculation.
4 - 18 Logical Operations
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