The most important setting is Maximum Current, Objects 0x8000:10 and 0x8010:10, because it limits the Output Current. Please set it to a Value in the range [0, 100], according to the attached PWM device. If you have an EL2535-0002, which makes 2A, and set 0x8000:10 to 15, your device will be driven with at most 300 mA.
The PWM input port of the block takes a double in the range of [-1, 1]. This range is mapped to [-Maximum Current, Maximum current]. So, with the example above, if the block input is set to -0.5, the EL2535 will output a current of -150 mA.
So, the formula is: Output Current = Nominal Current · Maximum Current / 100 · Block input.
Additional values can be mapped to the block outputs, the actual current, the current setpoint, the duty cycle and the actual supply voltage. This setting is available in Extra Outputs Tab.