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The Python classRS232TDVCmdProtocol gives access to
the integrated communication RS232 component.
The following events are available:
- PacketStart()
- PacketEnd()
- Command(Command)
- Value(Name,Value)
PacketStart and PacketEnd are used for packet separation. Each packet may
contain multiple Command and Value events but normally a packet contains a
leading Command followed by optional Value events. Internal in Scorpion, the
PacketStart event is used to Reset of previous events, the Command and Value
events is validated and collected and in PacketEnd the complete
command-event sequence is executed.
A typical command is
- <stx>SetValue;A.Value=12.0<stx>
The following events are generated :
- PacketStart
- Command - where Command=SetValue
- Value where Name=A.Value and Value=12.0
- PacketEnd
Returning 1 in the these events will be ignored by Scorpion.
Note ! Any changes to the component configuration will be persistent. If
these settings is temporarely the script must retrieve the origin settings
before setting new values and finally restore origin settings when done.
The following methods are available for the RS232TDVCmdProtocol
instance
| Method |
Parameters |
Comment |
| Send(value) |
string |
sends a TDVCMD formatted string |
| GetTimeout() |
none |
returns timeout in seconds |
| SetTimeout(value) |
int |
no of seconds |
| GetPortNo() |
none |
returns current COM port |
| SetPortNo(value) |
int |
sets current COM port (RS232) |
| GetPortOpen() |
none |
returns 0/1 - closed/open |
| SetPortOpen(value) |
int |
1=open, 0=closed |
| GetPortParametres() |
none |
returns current settings as semocolonseparater string
RS232 : 'baud;bytelen;parity;stopbits' |
| SetPortParametres(value) |
string |
format must be in following order:
RS232: 'baud;bytelen;parity;stopbits' |
Example - send some results over rs-232.
resX=str(GetValue('CenterLine.Line_x')) #get x position
resY=str(GetValue('CenterLine.Line_y'))
#get y position
RS232TDVCmdProtocol.Send('INSP;X=' + resX + ';Y=' + resY) #send the
result |
