ASCII Modbus Example code

WEP

Member
W
Join Date
Aug 2002
Posts
1
Hi All,
I'm looking for some example code for implementing ASCII version of Modbus on a PC. I need to write a program in C to interogate PLC slaves. Does anyone know where to find any examples on creating messages and the LRC?

Thanks for your help,

Bill
 
I asked a similar question some time ago. Check for my thread about Modbus CRC generation, one of the responses has a great sample attached.

AK
 

Similar Topics

I
problem on Controllogix to send/read Modbus TCP data & using TCP-ASCII bridge
I am working on a project, inside an AB CLX, I implemented the Modbus TCP Client AOI published on AB website, to interreact with a Modbus ASCII...
Replies
7
Views
3,540
TheWaterboy
TheWaterboy
STEMAPPLICATIONS
DL05 and GS4 Modbus ASCII Issue
I have had to write my own Modbus ASCII "driver" for an old DL05 talking to a GS4. I am using the Modbus Slave program for testing. A PID is...
2
Replies
17
Views
6,968
STEMAPPLICATIONS
STEMAPPLICATIONS
ganutenator
cheapest robust way to convert an ascii string serial to modbus tcp relay closure.
Found an awesome point of sale for $500. It sends an ascii string when a product is sold. Need to convert this into a number between 0 and 255 or...
Replies
1
Views
2,265
damica1
D
R
ModbusASCII versu Modbus+
In all my years of control work, I've had limited exposure to Modbus communications. Can anyone explain to me the difference between ModbusASCII...
Replies
6
Views
2,749
BobB
BobB
A
Micrologix 1400 send value as ASCII via Modbus TCP
Hi all, Question straight up: if I have a micrologix 1400 with a value of 1234 in register N7:0, how can I convert that value to ASCII values and...
Replies
6
Views
5,878
ASF
A
Back
Top Bottom