MSB780(X) - User’s Guide
Table 1: MSB780 RS-232 connector wiring
RS-232 cable wiring
MSB780 or MSB780X terminal male DB9 pin number
RXD 2
TXD 3
GND 5
2.5 Power saving mode
The barometer features power saving mode. It only applies for models without touchscreen
display option as the display measures continuously to keep the data up to date all the time.
The power saving mode is activated, if "smode" is set to "STOP" for both RS232 and RS485
(see cnf? command on page 34) and all the interfaces have been idle. Averaging (see avrg
command on page 43) has to be turned off as well. Falling into the power saving mode reduces
power consumption. Turning the barometer off by power button (if installed) reduces power
consumption to less than 50 µA.
To enable the power saving mode, connect to the service port using service cable, open your
favorite terminal program, set the port to 230400 Baud, 8N1 and issue the following commands:
terminal rs232<cr>
open 0<cr>
SMODE<cr>
STOP<cr>
tclose<cr>
terminal rs485<cr>
open 0<cr>
SMODE<cr>
STOP<cr>
tclose<cr>
avrg<cr>
0<cr>
2.6 Serial interface (RS-232)
Serial interface can be used to connect MSB780 or MSB780X sensor to a datalogger, or to a
PC. To connect to RS232 computer port, a serial cable is needed.
Wiring of a RS-232 to PC cable with DB9 connector can be found in table 1.
Standard serial interface supports asynchronous communication at speed 9600 bps. Default
parameters of RS-232 communication can be found in table 2. These parameters may be
changed using command seri<cr>, please refer to section 6.10 on page 38.
14
To Next Page
Loading...
