User's Manual

COBALT UHF-SERIES CHAPTER 5: COMMAND PROTOCOLS

PAGE 75 OF 140

5.5.8 CBx Protocol: Error Response Packet Structure

A one-byte Error Code will be returned in the MSB of the seventh data word of an

error response packet (followed by 0x00 in the LSB).

ERROR RESPONSE ELEMENT MSB LSB

Overall Length

: 2-byte value indicating the

number of “words” in the Response Packet.

This value will always be at least 7 words (6 +

1 for the error code).

0x00 0x07

Error Flag

: 0xFF in the MSB indicates that an

error occurred.

Error Information Byte

: 0xFF in the LSB

indicates that a controller-based error

occurred. Any value other than 0xFF indicates

that a Gateway or Hub-based error occurred

(and indicates the command that was

attempted when the error occurred).

0xFF 0xFF

Instance Counter

: This 1-byte value tallies

the number of responses from a given Node

ID.

Node ID Echo

: 1-byte value in LSB indicates

the Node ID of the controller that experienced

or generated the error. (Cobalt -IND = 01)

<IC> 0x01

Month and Day Timestamp

Hour and Minute Timestamp

Seconds Timestamp

in MSB

Additional Data Length

in LSB (1 byte for

“Error Code”)

<Seconds> 0x01

Error Code

: 1-byte Error Code in MSB

0x00

in LSB

<Error Code> 0x00

Table 5-18: CBx - Error Response Packet Structure