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Author Topic: use Protocol::Modbus and ccs  (Read 8593 times)
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luca_l
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« on: February 11, 2008, 11:16:50 23:16 »

I need some suggestions to use Protocol::Modbus on pc as a master
and a pic programming with ccs for slave.
any kind of help is welcome.

thank you very much
Luca

P.S. googling I also found  Java Modbus Library too.
      but now this is planed for a future  project.
  Grin
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phu_thanh
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« Reply #1 on: February 12, 2008, 11:48:06 11:48 »

Hi luca_l

If you are familiar with Visual Basic 6. Then visit this website: http://www.modbus.pl/vb.htm
You can download the Modbus RTU Master project in VB6.
There also have a PIC modbus RTU slave project. However it is written and compiled with PICBASIC and HI_TECH C.

phuthanh


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baba
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« Reply #2 on: February 12, 2008, 03:43:16 15:43 »

Hi Luca
I already done a modbus slave using a PIC16f873 and using CSS.
The projects was a modbus IO, in order to received input logic signal and send out logic signal.

bye.
BABA
 
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bogdantk
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« Reply #3 on: February 13, 2008, 07:44:05 07:44 »

Hello Baba
Maybe you will post the project on the forum.
I think it will be interesting for a lot of people.
I look forward.
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Dembo
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« Reply #4 on: February 13, 2008, 10:42:38 10:42 »

Once I found this client/server package from FieldServer Technologies for MCC18. I havn't tried it yet, but looks useful for modbus.

http://rapidshare.de/files/38563892/modbuspw.zip.html

Also some info and utilities on their site:

http://www.fieldserver.com/techsupport/utility/utility.php

 
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titi
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« Reply #5 on: June 21, 2012, 08:55:44 20:55 »

Hi,

This is an implementation of Modbus Slave in MikroC with a P18F45K22.
From LibStock http://www.libstock.com/projects/view/355/modbus-slave

Download File: http://www.libstock.com/projects/download/355/0/355_modbus_slave_v1.0.0.2.zip

Best regards.
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centiane
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« Reply #6 on: January 07, 2013, 09:59:44 21:59 »

Hi, one question.
ModBus is same RS485?

In this case is posible comunication more than 100 meter.

Regards Moises.
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allegro
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« Reply #7 on: January 07, 2013, 11:22:50 23:22 »

Hi, one question.
ModBus is same RS485?

In this case is posible comunication more than 100 meter.

Regards Moises.

If I understood your question correctly.. The modbus protocol is used a lot over rs485 twisted pair communication. Modbus is not rs485. At the expense of lower baudrate you can communicate over a long distance (>100m).
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Ganymed
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« Reply #8 on: January 09, 2013, 03:15:41 15:15 »

RS485 is the physical layer (Layer 1).
Modbus is a protocol on data link layer (Layer 2).

Further informations you can find on http://www.modbus.org.
E.g. Modbus-Specification: http://www.modbus.org/docs/Modbus_over_serial_line_V1.pdf
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centiane
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« Reply #9 on: January 09, 2013, 05:46:36 17:46 »

Ok thank you.
I use RS485 for comunnication PLC and INVERTER (omron).

Regards Centiane.
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