Standby: The equipment is idle but ready.
Running: The equipment is active and operational.
Fail: The equipment has encountered a fault condition.
Other: It's possible to add more states, but new states need to be generated in the core library as well; consider use the 3 basic states before adding more.

Strategy concepts

The emulator is able to run different predefined strategies to control the modbus registers, this is the list of available strategies:

Single Value: This strategy will set a value to a setpoint, it has the option to add noise to the value.
Random: Random value between 0 and 100, can be used to L1 testing.
Ramp: The selected value is going to be adjusted in a constant step rate, to a setpoint, setpoint can be updated in execution time.
Saw Wave: Moves the value between two sepoints with constart increments, once it reaches the limit it will reverse direction.
Square Wave: Constant change between two sepoints with instant change between them.
PID: Full PID controller, you need to give a output, input and setpoint modbus address, PID calculate the output based on the input and the PID constants.
Totalizer: Constant increment of a value, to emulate run hours. For more details read the specific strategy implementation