Vaisala HUMICAP MMT162 Betriebsanweisung PDF herunterladen (Seite 35)

Chapter 4 _________________________________________________________________ Operation

VAISALA ________________________________________________________________________ 33

Set Serial Interface Mode

Use the SMODE command to set the default serial interface mode.

SMODE [xxxx]<cr>

where

xxxx

STOP, RUN or POLL

Table 8 Output Modes

Mode

Measurement Output

Available Commands

STOP

Only with the SEND command.

All (default mode).

RUN

Automatic output.

Only command S.

POLL

Only with the SEND [addr]

command.

SEND [addr] and OPEN [addr].

Other commands available after

opening a line to the transmitter

using the OPEN command.

Use with RS-485 buses where

multiple transmitters can share

the same line.

MODBUS

Must be read from the

transmitter using Modbus

protocol.

Modbus protocol only; see

Appendix A, Modbus Reference

on page 70.

When several transmitters are connected to the same line, each

transmitter must be entered an own address in the initial configuration,

and POLL mode must be used.

If the Modbus mode is activated, serial port commands cannot be used

with the device. To access the serial port command interface, follow the

procedure in Accessing Serial Port Command Interface from

Modbus Mode on page 44.

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Vaisala HUMICAP MMT162 Betriebsanweisung Seite 35