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.

Topics - mhampson

Pages: [1]

Technical support / Corrupt EEPROM

« on: February 04, 2005, 10:38:37 AM »

After a program download, one of my PLCs failed on a checksum error. I want to download the program again, but now when I try to download, I get a "Enter Prog. Transfer password" box and cannot get past it. From what I read, this was a feature of the old DOS versions and is no longer supported.

Is there a way around this? I just want to reset the PLC and start from scratch. I really don't want to have to find an old DOS machine and run an old version 4 just to reset the PLC.

Michael Hampson

Technical support / Analog Output Impedence

« on: July 09, 2004, 06:43:12 AM »

Hi,

I am utilizing an analog output feeding a relatively high impedence analog input on a pump controller. The analog output is dropping about .35 V (to 4.65VDC) at 100% output. I am assuming I need a higher impedence signal conditioner, which I will get.

For future reference, what is the output impedence of this circuit? From my calculations of a .35 V drop into a 65K input impedence, I get a 5K impedence. Could a supprt person verify this?

Thanks
Michael

Technical support / Pulse Frequency Measurement Problem

« on: March 30, 2004, 05:00:19 AM »

I am trying to measure pulse frequency on my T100MD+ on channel 3 and am getting a 0 reading at all times. My actual pulse frequency should be around 5 (will be higher when installed). I have a "PMON 3" in my setup function which executes on the first scan, and every second thereafter, I have a function that runs which executes a "A = pulsefrequency(3)" instruction. A is always 0. I am using digital input #3 and can see the input light flashing rapidly, and I am not using the input for anything else (HSC etc.) in the program.

What am I missing here? I am going to try another channel and poke around with some things this morning. This is the only thing lacking before my customer trial.

Thanks,
Michael Hampson
XL Automation, Inc.

Technical support / Multiple PID Loops?

« on: March 21, 2004, 07:36:20 PM »

Can I implement more than one PID loop in the T100MD+ PLC? I need two independent PID loops, each based on separate SP and PV inputs and CV outputs. Can I do a PIDdef for each channel, or can I just do one? Luckily, one PID has no D gain, so I can build my own PID for that loop without too much trouble if necessary.

Thanks,
Michael Hampson