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Topics - Dogface

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Technical support / Modbus RTU
« on: February 14, 2007, 04:39:28 AM »
This may be a rookie question.....
I have a Frequency Inverter that I'm trying to control using Modbus RTU.  The Control Functions of the drive use function 06.  I may be wrong, but it looks as if I can only use Writemodbus for functions 03/04?  Setsystem 6,6?

I'm lost without Writemodbus.

Thanks,
Dogface

2
Technical support / pulsefrequency
« on: January 15, 2007, 05:59:40 AM »
I think I'm missing something.  I'm trying to display the speed of a slow moving drum using pulsefrequency but am getting very strange results.  By strange, I mean unuseable.
T100MD24
pmon 1 in 1st scan.
npn proximity sensor connected to input 3.

The sensor is picking up the teeth on a gear which has 39 teeth and ranges from 1 to 15 RPM.

The results I get from pulse frequency go from 500 to 1600...I would be expecting something closer to 1 at slow speed and as high as 585 at maximum speed.

Any ideas?  Pulse width and Pulse period are equally unstable.

Thanks,
Sean

3
Opinions & Feedback / Love my PLC's
« on: November 26, 2006, 09:51:24 PM »
Great PLC's!  A rookie like me .... well, even I can program them!  Thanks for a super product with some of the best support I've ever seen!

Nice new look, feel, and responsiveness on the website too!

Thanks,
Sean

4
Technical support / work smart
« on: August 18, 2006, 03:17:41 AM »
For anyone else that is as much a noob as myself.  Don't get cocky, if you need to physically work on a PLC, turn off the power first.  Or you may find yourself in the postion I am in....ordering a new PLC.  Great PLC by the way!

5
Technical support / M-7018
« on: March 18, 2006, 06:50:28 AM »
The M-7018 is the Modbus RTU version of the I-7018.  GREAT! Says I!  One comm protocol for everything.  I can't get these to work with the PLC at all!  I can read the status of the Module using DCon.  I can communicate with the PLC.  Just can't get the two to talk to each other.
Is there any chance of someone out there that has used the combination of M-series Tri-PLC and M-7018 from ICP-DAS?

Thanks,
Dogface

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