Vaisala GMP343 - Manual (Page 41)

Chapter 4 ________________________________________________________________ Operation
VAISALA_______________________________________________________________________ 39
Preparation for Network Operation
Before GMP343 is connected to the network it must be configured. Normal
procedure is shown below:
First connect the device to PC by using RS-232 and when communication
is currently open, key in the following commands:
RSMODE 485
ADDR addr
(where addr is 1...99)
SMODE POLL
SAVE
Next turn the power off. Then you can connect the device to RS-485
network.
Commands during Network Operation
When GMP343 is connected to the network, the following commands can
be entered:
Compensation values that are entered with compensation commands (XP,
XO, XRH) are used for compensation but they are not stored permanently.
Note that compensation commands do not give any reply. If value in
command is not acceptable, the command is rejected.
SEND addr Return latest CO
2
value
XP addr pressure Set pressure for compensation
XO addr oxygen Set oxygen for compensation
XRH addr
humidity Set humidity for compensation
OPEN addr Open device for normal communication (i.e. to
STOP-mode)
CLOSE Switch the device from STOP-mode to POLL-
mode.