Adcon A720 Guía de usuario descargar pdf (Pagina 63)

CHAPTER 3

Operations at the Application Level

REMARKS When a station has a master flag set, the gateway uses that station

for date/time synchronization. It is important to understand that

each remote station has an internal real-time clock, used to stamp

the stored data. This clock has to be initialized and synchronized,

which the gateway does automatically when either of the following

occurs:

• A station returns invalid time values (null or out of date).

• The host computer synchronizes the time of the gateway

(such as with a SET TIME command).

If the remote stations in a network are to be polled by more than

one base station, only one of those base stations should be used

to synchronize the time of a particular RTU. Otherwise, the remote

stations could get confused due to the time differences that might

occur between different base stations. Consequently, in a multi-

gateway network, only one gateway should have the master flag

set for a specific station; all other gateways should treat it as a

slave.

To verify whether a device has the master bit set, use the INSPECT

command (see page 79).

XAMPLES master 2333 on

master 2333 off

ACTIVE

DESCRIPTION Set/resets the active flag of a specific device.

ARAMETERS The device ID and the flag value (on/off).

ETURNS OK or an error message.

EMARKS Activates/deactivates the poll of a device. If a device has this flag

set, then data will be collected over radio from this device; if the

flag is reset, the gateway will cease polling it.

XAMPLES active 2333 on

active 2333 off

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Adcon A720 Guía de usuario Pagina 63