How to Calculate I/O Points of User I/O

The following formula shows the maximum number of user input/output points by setting the maximum input/output size.

However, set the input/output size in units of 2 bytes.

Formula

• Standard allocation: Input size [byte] × 8 - 40
• Standard allocation: Output size [byte] × 8 - 32

Calculation Example

For example, if both the maximum input size and the maximum output size are set to "34" [byte], the maximum user input/output points will be the following.

• Maximum number of user input points : 34 × 8 - 40 = 232
• Maximum number of user output points : 34 × 8 - 32 = 240