Which instruction would you use to toggle a bit in ControlLogix?

To toggle a bit in ControlLogix, utilizing the combination of the Examine If Closed (XIC) and Output Energize (OTE) instructions effectively achieves the desired outcome.

The XIC instruction acts as a conditional check that allows the program to determine if a specific bit is currently set or not. When used in conjunction with the OTE instruction, which sets or resets the state of an output bit, this combination can create a toggle effect. Specifically, when the XIC instruction evaluates to true (indicating the bit is currently set), the OTE instruction can be programmed to reset (clear) the bit. Conversely, if the bit is not set, the OTE instruction would set it, thereby achieving the toggling behavior.

In this method, the continuous looping of the logic will evaluate the state of the bit and alternate between on and off states, resulting in a toggle. This approach is intuitive and leverages the built-in capabilities of ControlLogix to manage bit states efficiently.

Other methods listed do not provide the straightforward toggle functionality as effectively as this combination. For instance, using solely the OTE instruction would not inherently toggle a bit but rather just set it.