IFM ecomat 100 R 360 Series, System Manual

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page 91
The function PWM_DITHER has to be initialised once for each
PWM output with DELTA selected individually. The dither
frequency can be different for channels 0...3, it has to be the
same for channels 4...7.
Current measurement
of PWM channels
The current of the coil can be measured via the analog inputs
integrated in the controller. This helps for example to adjust the
current should the coil heat up so that the hydraulic relations in
the system remain the same.
Ramp function If you do not want a hard change from one PWM value to the
next (e.g. from 15% on to 70% on, see graphics in this chapter)
you can e.g. use the PT1 function (see chapter 10) to achieve a
delayed increase. This can also be accomplished by counting
up step by step to the new set value in the application software.
This way hydraulic systems can e.g. be soft started.
Program example A program example for the PWM functions of the ecomat R 360
is saved on the program diskette ecolog 100
plus
.
The PWM function of the controller ecomat R 360 is a
hardware function provided by the processor. If the PWM
function is initialised in one of the output groups (0...3 or
4...7), the digital inputs (IX0.08...IX0.11 or IX0.16...IX0.19)
and the digital output functions are not available. The
PWM function remains set until a hardware reset
(switching off and on of the supply voltage) has been
carried out.