User's Manual

COBALT UHF-SERIES CHAPTER 5: COMMAND PROTOCOLS
PAGE 67 OF 140
5.5 CBX COMMAND PROTOCOL
The CBx Command Protocol is based on a double-byte oriented packet structure
where commands always contain a minimum of six data “words,” even when one or
more parameters are not applicable to the command. CBx does not support the
inclusion of a checksum byte.
The CBx Command Protocol, utilized by Cobalt UHF-CNTL-IND-02 and (when
connected to a Gateway or Hub interface module) UHF-CNTL-485-02 models,
includes Multidrop Subnet16™ networking support for use with Industrial Ethernet
applications.
Moreover, the packet structures described herein are protocol independent and can
be implemented the same for all Ethernet protocols (Ethernet/IP, Modbus TCP and
Standard TCP/IP protocol).
5.5.1 CBx - Command Procedure
Cobalt UHF-CNTL-485-02 Command Procedure
For the Cobalt UHF-CNTL-485-02, controller-bound commands are initiated by a host
computer or Programmable Logic Controller (PLC) and are delivered to the controller
by a Subnet16 Gateway or Subnet16 Hub Interface Module that is connected to the
host or PLC by standard Ethernet cabling.
Each Cobalt UHF-CNTL-485-02 connected to a Multi-drop Subnet16 network is
assigned an individual Node ID number between 1 and 16.
When a controller-bound command is issued, the instructions are retrieved by the
interface module (Gateway or Hub) and distributed to the correct RFID controller by
specifying the “Node ID” number of the particular controller.
Cobalt UHF-CNTL-IND-02 Command Procedure
For the Cobalt UHF-CNTL-IND-02, commands are initiated by a host computer or
Programmable Logic Controller (PLC) and are retrieved by the controller via Ethernet
connection.
Commands are directed to the Cobalt by specifying, in the command packet, the
“Node ID” number of the Cobalt Controller. For the Cobalt UHF-CNTL-IND-02, the
Node ID will always be 01 (0x01).
ATTENTION: This Cobalt UHF Series Manual does NOT contain descriptions or
examples of each supported RFID command common to all the devices in the Cobalt
family. For complete details regarding the use of common RFID commands please visit
www.ems-rfid.com and download the CBx Command Protocol – Reference Manual.
Here you will find only the commands that are specific to the UHF controller.