Aalborg TIO Totalizer I/O Flow Monitor/Controller - Manual (Page 80)

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APPENDIX C
Totalizer-IO ASCII Commands Set
RS232/RS485 Rev. A1 07/18/2011
The standard Totalizer-IO comes with an RS232 interface. The protocol described
below allows communication with the unit using either a custom software pro-
gram or a “dumb” terminal. All values are sent as printable ASCII characters. For
RS-232 interface, the start character and two characters of address must be omit-
ted. For the RS485 interface the start character is always ‘!’ and two characters of
the address follow. The command string is terminated with a carriage return (line
feeds are automatically stripped out by the Totalizer-IO:
RS-485: !<Addr>,<Cmd>,Arg1,Arg2,Arg3,Arg4<CR> Example: !12,F<CR>
RS-232: Cmd,Arg1,Arg2,Arg3,Arg4<CR> Example: F<CR>
Where: ! Start character **
Addr RS485 device address in the ASCII representation of hexidecimal (00
through FF are valid).**
Cmd The one or two character command from the table below.
Arg1 to Arg4 The command arguments from the table below. Multiple arguments are
comma delimited.
CR Carriage return character.
**Default address for all units is set to 11 hex. Do not submit start character and device
address for RS-232 option.
Several examples of commands follow. All assume that the Totalizer-IO has been config-
ured for address 18 (12 hex) on the RS485 bus:
1. To get a flow reading: !12,F<CR>
The device will reply: !12,50.0<CR> (Assuming the flow is at 50.0% FS)
2. To get current Flow Alarm status: !12,A,S<CR>
The device will reply: !12,AS:N<CR> > (Assuming no Alarm conditions)
3. To get Totalizer#1 reading: !12,T,1,R<CR>
The device will reply: !12,T1R:93.5<CR>
(Assuming the Totalizer#1 reading is 93.5)
4. Set the flow High and Low Alarm limit to 90% and 10% of full scale flow rate:
!12,A,C,90.0,10.0<CR>
The device will reply: !12, AC:90.0,10.0<CR>