Pulse width

[DAlgie]

Hi, I am trying to output a varying pulse width signal. I need it to be between 1ms and 2ms, in tenths of a ms. This is from a FMD1616. I read all the literature and is is unclear if this is possible. The older TMD 1616 had only a certain amount of fixed pulse frequencies I believe.

[support]

Yes, you can use the SETPWM command to set the duty cycle and the frequency of a PWM output. For FMD PLC the frequency is continuously variable between 50Hz and 50KHz so you can create a wave form with very accurate frequency/period, and you can compute the duty cycle required to generate the pulsewidth of your choice.

Are you trying to control a RC Servo with 1ms to 2ms signal? Section 11.4 in the FMD PLC User's Manual Section describes how this can be achieved.

[DAlgie]

Yes, that's it exactly, need to control a number of RC servos (among other things). PAGE 11.4 of the users manual (the book)only shows For...Next statements, which users manual do you mean?

[support]

http://www.tri-plc.com/documents/FMD1616-10-UserManual.pdf

[DAlgie]

Thank you, that is it exactly.