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You need to specify the state type of an object so the object knows how to determine its state. The following table describes each of the four state types.

State Type	For	How to decide the state
Bit	Bit Variable	The state is the value of the variable. Example: 1) The state of $U1.3 is 0 when $U1.3 is 0 (off). 2) The state of WX3.f is 1 when WX3.f is 1 (on).
Value	Word Variable, Double-word Variable	The state is the value of the variable. The valid states are from 0 to 255. Example: 1) The state of $U200 is 123 when $U200 is 123. 2) The state of WX20 is 0 when WX20 is 0. 3) The state of $N300 is invalid when $N300 is 999.
LSB	Word Variable, Double-word Variable	The state is the number of the least significant bit of the variable’s value that is 1 (on). For a word variable, the valid state are from 0 to 16 and state 16 means all the bits are 0. For a double-word variable, the valid state are from 0 to 32 and state 32 means all the bits are 0. Example: 1) The state of $U200 is 1 when $U200 is 246H. 2) The state of WX20 is 19 when WX20 is 80000H. 3) The state of $N300 is 16 when $N300 is 0.
Custom	Word Variable, Double-word Variable	When you configure an object with the Custom state type, you assign each valid state a unique number which is called a state value. The assigned state values will be used to determine the state of the object. If the variable’s value is equal to one of the state values, the corresponding state of the state value is the state of the object. If the value is equal to none of the state values, the state is invalid. Example: An object monitors $U100 and its state type is Custom. There are three valid states and you assigned 300, 200, and 100 to state 0, 1, and 2 respectively. The state is 2 when $U100 is 100 and the state is 0 when $U100 is 300.