Show Posts

This section allows you to view all posts made by this member. Note that you can only see posts made in areas you currently have access to.


Messages - Ken Talley

Pages: [1]
1
General Discussions / Re: unitronics visio 230
« on: June 02, 2003, 05:44:38 PM »
How are you viewing the value in memory?  And what code are you using to post the value to the screen?

2
Technical support / which algorithm is used by TBASIC
« on: March 09, 2002, 07:36:52 AM »
Hello,

Does anyone know which of the following algorithms the PIDdef function in TBASIC is equivelant to?

First form: Kc(1 + 1/Tis)(1 + Tds)/(1 + Tds/Kd)
Second form: Kc'(1 + 1/Ti's + Td's)
Third form: Kc" + 1/Ti"s+Td"s

Thanks,
Ken

3
Technical support / Re: Simultaneous use of one channel
« on: March 10, 2002, 08:33:21 AM »
Would it make the most since to do it as you described or is their an accurate way in programming to totalize using frequency verses time.
Ken ???

4
Technical support / Simultaneous use of one channel
« on: March 09, 2002, 10:58:21 AM »
Is it possible to use one phycical input by two or more TBASIC functions. For example measure the pulse frequency for PID information and at the same time run a Highspeed counter to function as a totalizer?

Thanks,
Ken

5
Technical support / lcd 420
« on: March 18, 2002, 06:57:48 PM »
Hello,
Does TRI sell any sort of accesories for the 4X20 lcd displays, such as enclosures or mounts.  If not does anyone else.  I am trying to figure out the easiest way to use the display in an instrument panel.

Thanks,
Ken

6
Technical support / high power transistor arrays
« on: March 23, 2002, 02:16:17 PM »
Hello all,
Does anyone know of an IC than has 2-4 transistors in one package.  I am looking for something that can handle approximately 10A per transistor.  What I am trying to do is step up the EXP 4040 to drive 3A coils in as small a package as possible.
Thanks,
Ken :-/

7
Technical support / Re: no floating point challenge
« on: April 30, 2002, 07:13:24 PM »
I've got two more questions.  Your formula shows decimal values.  Is that strictly for informational purposes or will Trilogi convert the values to none decimal values in compilation?  In other words can I use decimal values when programming?  Next question, does PULSEPERIOD count from leading edge to leading edge, ie the instant the sensor turns on to the instant the sensor turns on?

Thanks,
Ken

8
Technical support / no floating point challenge
« on: April 29, 2002, 08:22:20 PM »
Hello everyone,

I have a requirement where I must look at a ring gear in a drive axle.  The axle has 33 teeth on it and the tire size is such that each tooth equals roughly 0.32' or 3306 pulses per 1000'.  I am trying to use pulsewidth to figure my speed in feet per minute.  What I came up with was this....   Feet per minute = ((((6000000))/(((Pulsewidth)X(3306))/(10000))))   Again where 3306 is pulses per thousand feet.  My first question is whether or not the TM100MD can process such large numbers, I think it can.  Secondly, is there a simpler/cleaner code for such a task.  The situation requires resolution to 1 gallon per minute.

Thanks,
Ken ::)

9
Technical support / auto calibrate code for PID function
« on: September 09, 2002, 08:43:53 PM »
Hello,

By any chance has anyone ever generated code that calibrates /  determines the values for the PID function.  I think I can figure it out but if anyone had something existing it would give me a jumpstart.  I am not wanting to recalibrate the function very often, I would just like to have the ability to set the gain and reset with out having to hook up a laptop to the plc's each time.  IE, I am implementing the t100md's as a control system in trucks and would like to just wire them up turn them on and have them figure out what the system response time is by themselves.

Thanks,

Ken Talley ;D

10
Technical support / PID questions
« on: October 11, 2002, 05:23:05 PM »
Hello,

I have a few questions regarding the PID function.  I think I have the P figured out.  The P is simply what is the error is multiplied by to create an output.  This number is then escalated by the I value with respect to time?  Is the s shown in the definition of PID compute refering to seconds?  I am trying to compute a very rapidly changing flow rate and hope to run the PID compute 10 times per second.  I am also making the assumption that D is kinda a booster to the whole function.  Would it be possible for someone to show the an actual sample calculation based on a sample PIDdef statement.  I have been researching but have come to the understanding that there are many different versions of PID.  If I could see how the Trilogy PID actually works it would be a great help.

Thanks,
Ken ;D

11
Technical support / How to find program scan time.
« on: October 29, 2002, 06:03:36 PM »
Hello,

Yep I am beggin' for another freebee, only because I know someone can probably tell me how to do it a lot faster than I can figure it out myself.  Yes, I am being lazy.
What is the easiest way to find the actual scan time of a program on a t100md+?  A value generated in one of the DM's or 32 bit integer would work, as I could check it with online monitoring.  I am sure this is relatively simple but have not had to work with highspeed counters yet.

As always, your responses are greatly appreciated.

By the way, no ideas on the lock up problem or was my question too general?

Thanks,

Ken

12
Technical support / CB Radio problem with Master/Slave Comm.
« on: November 17, 2002, 09:23:42 AM »
Hello all,

After almost a year of work, I have actually had the machine work.  It consists of two TM100MD+ in a master/slave config.  All works well with one MINOR problem.   The system is on a Peterbilt truck.  When I use the CB Radio it shuts the system down while I am talking.  This is not good because the system controls a road oil spreading apparatus on the back of the truck.  Therefore when I am spreading and talk on the CB it shuts the unit off then on again and leaves a blank spot in the road.  This is not good.  I do not have the luxury of just not talking on the radio.  I am currently using and foil wrapped and wire braided shielded cable for communication and power from the slave to the master PLC.  Any ideas?

Thanks,
Ken

Pages: [1]