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GWY-01-DNT-01 MANUAL – REV. 02 CHAPTER 3:

RFID COMMAND MACROS

PAGE 28 OF 67

CHAPTER 3:

RFID COMMAND MACROS

What are RFID Command Macros?

RFID Command Macros are a powerful feature of EMS’ Cobalt, C-Series and HF-

0405-Series Controllers. Macros are simple programs that direct a controller to

execute multiple pre-programmed instructions.

Because macros reside within the controller’s internal memory, they can be

programmed to instruct the controller to automatically read and/or write a specified

set of data to an RFID tag without the controller ever having to receive a command

from the host. In fact, the controllers do not even require a connection to a host in

order to execute macros.

Each macro can contain up to 255 bytes of data and each supported controller can

store up to eight macros at a time. Though they are stored locally on the controller,

macros are also backed up in the Gateway’s flash memory as well.

Why use macros?

The power of macros is in distributed intelligence, the reduction in network bus traffic

and the ability to accelerate routine decision making at the point of data collection.

What can macros do?

In addition to the automated reading and writing of data, macro capabilities include:

• The ability to write time stamps to RFID tags

• The ability to filter command responses to only those of interest to the host

(such as when an error occurs or when a tag has arrived in the RF field)

• The ability to harness powerful logic and triggering capabilities such as; read,

write, start/stop continuous read, data compare, branch, transmit custom

string, and set outputs.

What is a macro trigger?

Macros are initiated by “triggers.” Triggers can be configured in numerous ways. A

simple command from the host, such as “execute macro number three” can be

considered a trigger.

Triggers can be configured, for example, to activate a macro when a tag enters or

leaves a controller’s RF field.

EMS RFID controllers can store up to eight separate triggers in addition to the eight

macros they can also house. Any trigger can activate any of the eight stored macros.

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Datalogic GWY-01-PBS-01 Especificaciones Pagina 28