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Sonsivri > Electronics > Pic C Languages (Moderator: o2) > PIC16F877 and Modbus
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kyawmyo
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« on: April 11, 2008, 03:45:23 03:45 »
Hi,
I am trying to develop an application that will interface with RS485 for Modbus protocol. Could anybody give me useful information regarding with PIC 16F877.

Rgds
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enen
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« Reply #1 on: August 07, 2008, 03:58:49 15:58 »
Hi ,
firstly Pic16f877 is not enough memory for Modbus.

you should 14f852 or more memory size pics.
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jorge7458
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« Reply #2 on: August 07, 2008, 06:07:10 18:07 »
The modbus is not a complex protocol and he would not have inconvenience by heart with a 16f877. he would Be necessary to see that it is what is wanted to send.   
Jorge
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j0k3r
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« Reply #3 on: August 07, 2008, 10:27:47 22:27 »
Look on the folder examples from the CCS compiler for the files:
ex_modbus_slave.c
and
ex_modbus_master.c
they have what you want.....
and, yes they use a
Code:
#include <16f877a.h>
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microtest
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« Reply #4 on: August 21, 2008, 06:29:30 18:29 »
exelent i am now testing it and post my schematic next time
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arash_tah
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« Reply #5 on: November 30, 2009, 04:52:04 04:52 »
Hi mikrotest I want to connect my micro to PLC via MODBUS do u have any idea?
can u share your sch and any detail in this regard
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