Datalogic GWY-01-PBS-01 Especificações descarregar pdf (Página 30)

GWY-01-DNT-01 MANUAL – REV. 02 CHAPTER 4:

COMMAND MAPPING

PAGE 30 OF 67

CHAPTER 4:

COMMAND MAPPING

A command is initiated by a host PC or Programmable Logic Controller (PLC) and is

distributed to the Gateway over a network connection. Once issued, the command is

then executed directly by the Gateway or is otherwise routed to the appropriate RFID

controller (specified by its numerical “Node ID” value, for which there are 16).

In general, there are two types of commands that can be issued:

 Controller Commands - commands intended for one of the attached RFID

controllers. “Read Data” and “Write Data” are two common controller commands.

 Gateway Commands - commands intended for the Gateway itself. Gateway

commands are those commands that query the Gateway for information or

instruct the Gateway to perform a task. The commands “Get Node Status List”

and “Set Notification Mask” are examples of Gateway commands.

4.1 CBX COMMAND PROTOCOL OVERVIEW

In order to execute RFID commands properly, the RFID device and host computer

must be able to communicate using the same language. The language that is used to

communicate is referred to as the Command Protocol. The command protocol used

by GWY-01-DNT-01 is called “CBx.”

The CBx Command Protocol is an advanced protocol that supports Multi-drop

Subnet16 networking with TCP/IP, DeviceNet and Industrial Ethernet applications. It

is based on a double-byte oriented packet structure where commands always contain

a minimum of six data “words” (12 bytes) - even when one or more packet elements

are not applicable to the command.

The CBx packet structures described herein are protocol independent and can be

implemented the same for all protocols (Ethernet/IP, Modbus TCP, DeviceNet, etc.).

ATTENTION: For complete command and response packet structures and examples of

each RFID command, please refer to the CBx Command Protocol – Reference

Manual available at www.ems-rfid.com

1 2 ... 25 26 27 28 29 30 31 32 33 34 35 ... 66 67

Sem comentários

Datalogic GWY-01-PBS-01 Especificações Página 30