Internet PLC Forum

I have an application that is counting inputs from an optical sensor with a conventional input to a standard counter. I suspect I am loosing counts at higher rates. The On time is quite short.

What is a good way to measure the scan time so I can estimate the rate I should be a able to read.

I would use the fast counters, but they are tied up.

Thanks.

In using TRiLOGI to develop programs for industrial applications a user can go at it many ways: All ladder programming, Ladder with a few Custom Functions, or mainly with BASIC in Custom Functions and a bare minimum of ladder circuits.

What style do you recommend to make development rapid, clean understandable program flow and solid application operation?

I know you could say ? Each application calls for a unique approach and combination of the tools based on the programmers analysis of the processes?  but I?m hoping for a general ideology statement based on your broad application and development experience with TRiLOGI.

Thanks

I think it would be helpful in future documentation to add an entry to
the keywords in TBASIC concerning the setting and reading of counter values using CtrPV[n]. Currently it is only listed under SetCtrSV as a footnote. Also the forn is somewhat differnet since you use the same command to both read and set the counter values.  Below is the foot note listed under SetCtrSV :

Related : The present values (P.V.) of counters can be read or written directly as integer variables   "CtrPV[n]". But the Set Values can only be changed by this function.

The current reference is a little obscure and takes away from this fine product.

I previously had asked about mouse wheel scrolling in TRI-PLC programming software. It is very convenient to scroll up and down in the source code with the mouse wheel.

I have discovered a solution in a small software package that lets you assign the mouse wheel control by application. The website is http://www.ardamax.com/mwc/ it is free to try for 30 days $14.95 to buy.

The control needs to be set to  the Javaw.exe file in your Java directory. I allows you to define control action and assignment. I'm sure there are other programs to do this, but this one worked for me.

One less development task for TRI-PLC.

Cheers !

Does the simulator display the changing state of the direction line (out5) for plus and minus stepper moves ?

I have a need to load a stepmove distance and then during the execution of that move and prior to completion, to stop the motor and hold position.

I then will continue the move to the original completion point. I would call this a "feed hold" type of function. It looks like I can create this function with the stepcount function and some code. I would like to simply execute a STEPSPEED 1,0 to cause the stepper pulse stream to stop until I give a new STEPSPEED command to resume the move, but it faults out.

Any elegant solutions come to mind? Suggestions of best way to do this?

Oh great one:

I have a machine which uses 24vdc solenoids sourcing current directly through the outputs on the T100MD2424+. It has worked well for many months, but has recently developed very rare output transitions. The only items being effected are the outputs driving the solenoids.

My thoughts are back EMF problems killing the chip or tripping it (just swapped it out so will see if helps).

Second the machine handles plastic tubing and can generate static build up. Possibly the static is causing this, but i would think I would see other problems too. I have added static discharge brushes to drain this off to ground.

The only way the solenoids change stae is through a CuFunction which toggles the output bit each time the CuFunction is executed. It is only executed by a manual foot switch with 1 second time eliminating false foot pedal trips.

Ideas, comments, great wisdom

Thanks
CCH