Vaisala HMP230 User Manual download pdf (Page 128)

HMP230 SERIES

Appendix 4: Digital current loop module M210225en-B

122

•

Set the transmitter in POLL mode:

>smode poll

Serial mode : POLL

NOTE 1

The SMODE command must be given last.

NOTE 2

The transmitter outputs no prompt (>) after the SMODE

POLL command and it only reacts to commands which

include its address.

• Check that the transmitter responds to its address:

send 22

RH= 24.4 %RH T= 29.1 'C

•

Disconnect the terminal.

• Remount the digital current loop module.

• Close the cover.

• When all transmitters on the network have been configured, switch

them off.

Dual loop operation

Single pair/dual pair use is configured through wiring (see figure on page 2).

The following procedure must be repeated with all transmitters.

• Open the transmitter cover.

• Pull out the digital current loop module, if it is already mounted.

• Set the serial port of the terminal to 4800 baud, even parity, seven

data bits and one stop bit, full duplex (4800 E 7 1 FDX).

• The serial settings of the transmitter must also be 4800 E 7 1 FDX

and the transmitter must be in STOP mode. If these factory settings

have been changed, they must be returned. Connect the RS 232C port

of the terminal to connector X17 on the top of the main board and

switch the power on.

RX GND TX

X17

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Vaisala HMP230 User Manual Page 128