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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>
Содержание TIO
Страница 14: ...10 Figure 4 3 RS 485 Multidrop Half Duplex Two Wire System...
Страница 55: ...51 Figure 6 2 Connecting TIO to the GFM using 0 5 Vdc output from DB9 connector...
Страница 56: ...52 Figure 6 3 Connecting TIO to the GFM using 5 10 Vdc output from RJ11 connector...
Страница 57: ...53 Figure 6 4 Connecting TIO to the GFM using 4 20 mA output from DB9 connector...
Страница 61: ...58 Figure 6 6 Connecting TIO to the GFC Using 0 5Vdc Input Output from DB15 Connector...
Страница 62: ...59 Figure 6 7 Connecting TIO to the GFC Using 4 20mA Input Output from DB15 Connector...
Страница 68: ...65 Figure 6 9 Connecting TIO to the Generic Flow Meter...
Страница 69: ...66 Figure 6 10 Connecting TIO to the Generic Flow Controller...
Страница 95: ...92 APPENDIX D Mechanical Drawings...
Страница 96: ...93 APPENDIX E Circuit Layout Diagrams Circuit Layout Top...
Страница 97: ...94 Circuit Layout Bottom Mirror...