Compact logix PLC with Modem to send SMS

Jason P

Member
Join Date
Jan 2006
Location
Burlington
Posts
22
Hey there,

Does anyone know how hard or easy it is to send SMS text messages using the RS232 port on the PLC to a GSM Modem and roughly whats involved to do this?

Thanks
 
Hi Jason,

It's a relatively painless process, and will vary from PLC to PLC.
In principle, you compile STRING data and use (in the case of Logix500) the AWT (Ascii WRITE) command to output directly to the modems serial port...

eg 'AT+CMGS=0123456789 <CR>' (mobile/cell number)
'Message Body' <Ctrl Z>' (sends text message)

I've posted a few examples over the years if you search...


I normally use (say) Hyperterminal to first prove the modem/baud rate etc, then just replicate using a PLC.


Hope this helps!


Rob
 

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