Operation
CAUTION !
These settings are adapted by the manufacturer to match the supplied configuration.
The user can change the settings after inputting the password (“File” menu item).
6.4.6
Operation via RS 485 (according to NAMUR NE 28)
Optionally the vacuum controller can be expanded to have an RS 485 port.
CAUTION !
The millibar is to be used as a unit of pressure.
The interface parameters must be set to:
RS 485, 9600 baud, 7 databits, no parity and 1 stopbit, no handshake
All entries are concluded with CR/LF. The answer is the required value concluded by CR/LF
or nothing with inputs.
Folowing commands are available:
START m
Start in mode m (1..10) (motor on, vacuum valve open, ventilation closed)
STOP
End Mode (motor on, vacuum valve closed, ventilation remains closed)
OUT_SP_0 x
Specified setpoint, permitted values 0..1000
IN_SP_0
Read current setpoint (4 digits with leading zeros)
OUT_PAR_0 0/1
Switch venting valve 0 = OFF, 1 = ON
IN_PAR_0
Reread the state of the vent valve 0/1
IN_PV_0
Read current pressure (4 digits with leading zeros)
STATUS
Current status: 0 = inactive,
1..10 active Mode or negative (error will be reset)
Following errors are defined:
- 1
OVL
Input buffer overflow (40 digits)
- 2
CMD Command
unknown
- 3
PAR Parameter
invalid
- 4
COM Communication
error (e.g. time-out)
Examples:
Transmission :
Reply :
STATUS [CR/LF]
+1 [CR/LF]
OUT_SP_0 100 [CR/LF]
none
OUT_SP_0 2000 [CR/LF] none, error –3
IN_PV_0 [CR/LF]
0435 [CR/LF]
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