Denso Power Net Terminal BHT-103 Dokumentacja Pobierz pdf (Strona 442)

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[ 5 ] Check Spread Spectrum Communications Device Syn-

chronization with Master

Using a spread spectrum communications device for TCP/IP communication requires synchro-

nizing with the master (e.g., access point). To check the synchronization, use the extension

library

SS.FN3.

In any of the following cases, a spread spectrum communications device may not be synchro-

nized with the master:

• When a spread spectrum communications device is opened (Opening a spread spectrum

communications device and synchronizing with the master will take a few seconds.)

• When a wireless block tries to synchronize with a new master in roaming.

• When a wireless block is moved out of the radio-wave area with the master.

• When a wireless block is moved to a place where there is any radio-wave obstruction

between the wireless block and the master.

For details about

SS.FN3, refer to Section 17.4, "Spread Spectrum Communication Library

(SS.FN3)."

Given below is a setting example using

SS.FN3.

timeout% = 100 ’Set time (10 sec.) to wait for

’synchronization with master.

call "ss.fn3" .fcSyncInf timeout%, assoc% ’Check synchronization with master.

’(SS.FN3 function #7)

’Returns value in assoc%

if assoc% = -1 then ’If synchronization is not complete,

goto Sync.Err ’go to Sync.Err.

endif

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