adccommunitymod (AutomationDirect) asked a question.
Created Date: March 17,2006
Created By: squills
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hello i have the DL06 and iam using modbus..i have never used it before and i have a couple eazy questions. first my display will be the master and the PLC will be the slave. So far with what i have seen. most of the programming is in the screen. What do i need for the plc part.. it seams like if i press a button on the screen it will turn on coil 12 does it just turn on coil 12 or is it sending a signal to the plc to turn on coil 12 which then the plc has to be programed to turn on the coil.. sorry very new to modbus commmucation..any help thanks, glen
Created Date: March 17,2006
Created by: Tech Guy
Are you using Koyo MODBUS addressing or standard MODBUS addressing? If it is Koyo MODBUS, then the bits are addressed directly by the touchscreen and no conversion or extra code is necessary.
If it is standard MODBUS, then you must convert the Koyo address into the MODBUS format. There is a handy spreadsheet found here. You do not need to do any additional ladder for this formst either.
Created Date: March 17,2006
Created by: squills
i belive it is regular modbus. i will check though the screen is from www.qsicorp.com there software is free to download. maybe you could give it a look for me ....
btw. i am not just looking for an eazy way. i have been researching this for awhile and trying to get this to work on my own...but time is running out and a little more help might help
cheers.
glen
Created Date: March 18,2006
Created by: jackson
Well, I was going to look at their manual real quick to see their protocol list but they require you to submit your phone number, email, etc... to get their manual. Sorry...ain't going to happen. I get enough junk mail and telemarketing calls as it is...
I highly doubt it is Koyo Modbus. The only Operator Interfaces I have ever seen that do Koyo Modbus is the panels that ADC sells.
I think you will need to reference the spreadsheet that Tech Guy posted the link to.
As long as the operator interface can reference the 'standard ' Modbus addresses (Coils, Inputs, Holding Registers and Input Registers) then no logic "should " be needed in the PLC. You just have to do the translation between the standard Modbus address and the Koyo addresses. The spreadsheet does that for you.
Created Date: March 18,2006
Created by: squills
ya that info is not tested...you can put a 1 for all the info(number, email, address,) and it will pass http://forum1.automationdirect.com/board/smile.gif trust me that is waht i did..
well thanks...ill take a look at it again and see if i can see it
Created Date: March 17,2006
Created by: squills
hello i have the DL06 and iam using modbus..i have never used it before and i have a couple eazy questions. first my display will be the master and the PLC will be the slave. So far with what i have seen. most of the programming is in the screen. What do i need for the plc part.. it seams like if i press a button on the screen it will turn on coil 12 does it just turn on coil 12 or is it sending a signal to the plc to turn on coil 12 which then the plc has to be programed to turn on the coil..
sorry very new to modbus commmucation..any help thanks,
glen