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INfinity 510 Protocol Reference Guide - Sirit

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Chapter 15 - Modem Namespace<br />

modem.protocol.isob.query_lock<br />

This function determines if the specified byte of an ISO-B tag in the field is<br />

locked. The parameters supported by this function are:<br />

tag_id – Indicates the id of the tag to query. The tag is first singulated<br />

and put in a state for a read operation.<br />

address – Specifies address (byte offset) of byte to query for lock state.<br />

antenna (optional) – Indicates antenna on which to execute the<br />

function. If an antenna is not specified, all antennas will be tried until<br />

the function succeeds or no more antennas are available.<br />

The response to this function is the lock status of the byte.<br />

The following example gets the lock status of the byte at address 202 on<br />

tag 0x301122334455667788:<br />

>>> modem.protocol.isob.query_lock (tag_id =<br />

0x301122334455, address = 202)<br />

ok byte = locked<br />

Type<br />

Permissions<br />

Parameters<br />

function<br />

guest=x,admin=x<br />

tag_id (array)<br />

address (int)<br />

antenna (int)<br />

<strong>INfinity</strong> <strong>510</strong> <strong>Protocol</strong> <strong>Reference</strong> <strong>Guide</strong> 167

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