APPENDIX L ____________________________________________________ SPECIAL EMULATION MODE
VAISALA ________________________________________________________________________ 105
Setra 470
A limited subset of commands is available provided that the switch
SW7 is set as in FIGURE L-3.
ON
OFF
SW1
SW2
SW3
SW4
SW5
SW6
SW7
SW8
S
FIGURE L-3 Special emulation mode
The serial bus settings are now as follows:
TABLE L-1 Serial bus settings in emulation mode
Baud rate 2400
Parity no parity
Data bits 8
Start bits 1
Stop bits 1
Duplex full duplex
Echo OFF
In this mode the PTB220 barometer ignores carriage returns, line
feeds and blank spaces. Just type the commands as given here.
At power-up the PTB220 barometers will respond:
VAISALA DIGITAL BAROMETER
PTB 220
BUSY
and then after a few seconds:
VAISALA DIGITAL BAROMETER
PTB 220
11.812 to 35.436 in Hg A
The output after the P command is:
30.1074 in Hg A OK
The output after the V command is:
VAISALA DIGITAL BAROMETER
PTB 220
11.812 to 35.436 in Hg A
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