Sensormatic View Manager 96 Console Installationsanleitung PDF herunterladen (Seite 155)

Appendix A RFID Device Adapter Reference 155

readerepcANT0 corresponds to physical antenna 1, readerepcANT1

corresponds to antenna 2, readerepcANT2 corresponds to antenna 3, and

readerepcANT3 corresponds to antenna 4.

Note – It is necessary to set the antennan (where n is the number of the antenna)

property to 1 to enable the use of antenna 1. Setting the EPC identifier for antenna 1

tells the RFID Event Manager to discriminate between the antennae if they are

enabled, but enabling the antenna is done through the use of the antennan

property.

■ Node – The Matrics reader sits on an RS 485 bus, a form of serial bus where

multiple serial devices can operate, unlike RS 232, where only one device can

operate at a time. Each node on a RS 485 bus must have an address. The serial-to-

network adapter relays commands to the reader based on this address. If

additional readers are present then they have other addresses. For normal

operation, no more than one reader is on the RS 485 bus. Each reader has its own

serial-to-network adapter port interface and is directly IP-addressable. The

following RS 485 address must be the same for all readers.

■ Power – This property controls the power level transmitted during a given read

or write interval. The normal transmit power of a North American Matrics RDR-

001 reader is 4 watts. In other locales, this value might be less. The actual value is

a percentage value. The minimum value is

01hex. The maximum value is FFhex,

which specifies a full power condition (in our case 4 watts). The power level is

logarithmic. With the reader RDR-001, the maximum power is about 30dBm. The

value C0hex is about 50 percent and 80hex is about 25 percent of the maximum

power

■ Environment – This property determines how long the reader tries to read tags

during a Read Full command. A larger number means longer, more intense

reading (more frequencies in an FCC part 15 reader are used). This property is

useful for applications where tagged items are not moving (stationary), such as in

a shelf application, to overcome issues with interference and RF-Null’s on a fixed

pool of tags.

<ems:properties>

<ems:property>Node</ems:property>

<ems:value>4</ems:value>

</ems:properties>

<ems:properties>

<ems:property>Power</ems:property>

<ems:value>C0</ems:value>

</ems:properties>

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Sensormatic View Manager 96 Console Installationsanleitung Seite 155