Logic in the digital object template

One / Zero bit Logic

Bit logic

Usually, when a bit in a byte or word is raised, that bit is considered high or active and when the bit is lowered, it is considered low or inactive.

Some PLC machines work with reverse logic, meaning when a bit is raised, it will be considered to be low or inactive and when the bit is lowered, it will be considered to be active or raised.

IGSS bit logic

IGSS uses the following terms to define the bit logic for individual templates.

One bit logic: A raised bit is considered active or high and a lowered bit is considered to be low and inactive.
Zero bit logic: A lowered bit is considered inactive or low and a lowered bit is considered to be active and high.

IGSS uses the One bit logic Active by default.

Change bit logic for each bit

You can define the One or Zero bit logic for each individual bit in the digital object or analog object template by clicking the 1 in the Logic row to toggle activation of One bit logic and the Zero bit logic for each individual bit.

A value of 1 activates the One bit logic for the bit and a value of 0 activates the Zero bit logic for the bit.