Vaisala HMP155 - Manual (Page 46)

USER'S GUIDE____________________________________________________________________
44 _______________________________________________________________ M210912EN-C
NOTE The error output value is outputted only when there are minor electrical
faults such as humidity sensor damage. When there is a severe device
malfunction, the error output value is not necessarily shown.
ADDR
Addresses are required only for POLL mode (see serial line command
SMODE on page 31) and intended for multi-purpose RS485 buses. Use
the ADDR command to input the RS-485 probe address. Without
parameters, ADDR command displays current probe address. When a
parameter is specified , it sets the probe address to the given value.
ADDR [0…99]
where
0…99 = address (default = 0)
Example: the probe is configured to address 2.
>addr
Address : 0 ? 2
>
OPEN
When all probes on the RS-485 bus are in POLL mode, the OPEN
command sets one probe temporarily to STOP mode so that other
commands can be entered.
OPEN [ADDR]
where
ADDR =address of the probe (0 ... 99)
CLOSE
The CLOSE command places the probe in temporary POLL mode. After
this you can only use the commands OPEN, SEND, and ??.
Example:
>close
line closed