Vaisala HMP240 - Manual (Page 80)

HMP240
Appendix 1: Serial commands
M210300en
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DSEND Outputting readings of all connected transmitters once
DSEND <cr>
All transmitters connected to the serial bus send their addresses and current
measurement readings in a sequence defined by their addresses. After
receiving DSEND command a transmitter sets a delay time according to its
address value and sends the data after this delay. DSEND works also in POLL
mode. With this command the user can, for example, easily find out the
addresses of the transmitters.
The output when four transmitters with addresses 4, 5, 10, 33 have been con-
nected to the serial bus:
>dsend <cr>
4 14.43 %RH
5 22.7 'C
10 14.99 %RH
33 22.3 'C
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ERRS Outputting error messages
ERRS <cr>
During operation, error messages are not automatically output through the se-
rial interface. If there is any reason to doubt that there is something wrong
with the transmitter, possible error messages can be output with command
ERRS.
If there are no error messages, only a prompt is displayed:
>ERRS <cr>
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If errors have occurred, the transmitter outputs the error code (see Appendix 4
for error messages):
>ERRS <cr>
E40 f ( all ) out of range
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