Topics

1

Support Questions / Modbus RTU - KOYO PLC

« on: September 24, 2014, 01:12:31 PM »

I've read through the post about Koyo PLC's and found a host of good information and have been able to get the latest version of the software installed and have almost everything working well except when trying to address a Click "DF" register.
I believe DF is (D)ouble word (F)loating point value. The Modbus address the Click software offers up looks like this:
Modbus address (function code) 428673 (03,06,16)
I am trying to read/right to this register and have had no luck.

Admit tingly I know little about Modbus addressing and have gotten as far as I have from examples and posts on this forum.
Any help will be greatly appreciated.

Thank you

2

Support Questions / Modbus/TCP ?'s

« on: April 12, 2013, 01:07:48 PM »

First question, is there a way to poll a memory location without the use of one of the controls?
For example I would like to poll a memory location and just place the result in a variable.

Second question, is there away to poll a memory location for a double word value?
Or is polling two single locations and combining values for double word result the only way to make this work?

Thank you

3

Support Questions / Null Reference Exception

« on: April 10, 2013, 09:01:45 AM »

I'm using the Modbus/TCP comm driver and with just a simple panel meter for the application.

I am able to read a single memory location and display it's changing value in the panel meter for approximately 10 seconds or so then I get the Null Reference Exception.

Is this a known issue? Any suggestions on what I might try?

Thank you

4

Feature Request / PLC Drivers Wanted

« on: March 26, 2013, 03:59:29 PM »

Please consider including a Koyo PLC driver.