Vaisala PTB220 User Manual download pdf (Page 71)

CHAPTER 8____________________________________________SELF-TESTING AND PROBLEM HANDLING

VAISALA _________________________________________________________________________ 65

CHAPTER 8 SELF-TESTING AND

PROBLEM HANDLING

Returning the serial communication

parameters

As the barometer software and hardware settings may not always be

known, it is important that the barometer can be returned to factory

settings. To do this, set the dip switch S1 on the CPU board as in

FIGURE 8-1. All switches except the SW8 must be OFF. In addition, the

serial interface must be set for basic RS 232C operation according to

FIGURE 8-2. With these selections, one single barometer can be

operated through the RS 232C serial interface using factory serial bus

settings as in TABLE 8-1. Returning the SW8 to OFF will restore the

original application specific software settings.

OFF

SW1

SW2

SW3

SW4

SW5

SW6

SW7

SW8

FIGURE 8-1 Factory settings for the dip switch S1

TXD

RXD

X15

RX/RXD

TXD

FIGURE 8-2 Basic RS 232C settings

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Vaisala PTB220 User Manual Page 71