# Sum Check Code

The sum check code is the lower one byte (8 bits) of the sum of all data included in the sum check range.

In the ASCII mode, data is converted into ASCII code before summing. Then, the lower 2 digits of the hexadecimal sum of all data is used as the sum check code.

In the binary mode, the lower byte of the sum of all data is used as the sum check code.

Example: Extend Mode, 1:n ASCII

The following data block writes "200" (decimal) to address 100 in the Memory Link:

Lower two digits, "39" (33H, 39H) are used as the sum check code.