Aalborg Vortex Insertion Manual de usuario descargar pdf (Pagina 85)

VORTEX METER ASCII COMMANDS SET Rev. 07/29/2010

RS232/RS485 The standard VORTEX METER comes with an RS232 interface. The protocol described below allows communication with the unit using

either a custom software program or a “dumb” terminal. All values are sent as printable ASCII characters. For RS-232 interface, the start character and

two characters of address have to be omitted. For the RS485 interface the start character is always ‘!’ and two characters of address are follow. The com-

mand string is terminated with a carriage return (line feeds are automatically stripped out by the VORTEX METER:

RS-485: !<Addr>,<Cmd>,Arg1,Arg2,Arg3,Arg4<CR> Example: !12,VF<CR>

RS-232: <Cmd>,Arg1,Arg2,Arg3,Arg4<CR> Example: VF<CR>

Where: ! Start character **

Addr RS485 device address in the ASCII representation of hexadecimal (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 VORTEX METER has been configured for address 18 (12 hex) on the RS485 bus:

1. To get a volumetric flow reading: !12,VF<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,FA,S<CR>

The device will reply: !12,FAS: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 volumetric flow high and low alarm limit to 90% and 10% of full scale flow rate: !12,FA,C,V,90.0,10.0<CR>

The device will reply: !12, FAC:V,90.0,10.0<CR>

APPENDIX B

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