jblkiller Posted June 18, 2012 Report Share Posted June 18, 2012 I would like to know with the M91 if can I use a potentiometer plug into the analogue input (0-10V) to setup the time of a timer? Thanks Quote Link to comment Share on other sites More sharing options...
MVP 2022 Joe Tauser Posted June 19, 2012 MVP 2022 Report Share Posted June 19, 2012 You could do it but you need to provide an external 10V signal for the potentiometer. I would use the PLC's power supply as a source and determine the resistor needed to put the "top" of the potentiometer to 10V and connect the wiper to the analog input. Then read the Help on special function 200 to get the value into the timer's preset. Joe T. Quote Link to comment Share on other sites More sharing options...
jblkiller Posted June 19, 2012 Author Report Share Posted June 19, 2012 When implementing a timer throught the HMI and assign a timer operand to the variable . Can I block the maximum seconde for the operator can't go over? Quote Link to comment Share on other sites More sharing options...
MVP 2022 Joe Tauser Posted June 20, 2012 MVP 2022 Report Share Posted June 20, 2012 U90 variables do not have a min/max like Visilogic variables do. You'll have to write some logic to read the timer preset and overwrite it with your max value if it's too big.. Joe T. Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.