User's Manual

COBALT UHF-SERIES CHAPTER 5: COMMAND PROTOCOLS
PAGE 70 OF 140
03 Instance Counter:
in MSB
(see description on following page)
Node ID Echo:
Value in LSB identifies
the Node ID of the device that performed
the command and/or generated the
response (will always be 0x20 for
Gateway/Hub, and 0x01 for Cobalt IND)
<Instance
Counter>
<Node ID
Echo>
04
Month and Day Timestamp
<Month> <Day>
05
Hour and Minute Timestamp
<Hour> <Minute>
06
Second Timestamp
in MSB
Additional Data Length:
Value in LSB
indicates the number of additional bytes
retrieved (when applicable)
<Second> <Additional
Data Length>
07
Retrieved Data:
(bytes 1 & 2) used to
hold 2-bytes of retrieved data (when
applicable)
<B1> <B2>
08
Retrieved Data:
(bytes 3 & 4) used to
hold an additional 2-bytes of retrieved
data (when applicable)
<B3> <B4>
Table 5-14: CBx Response Packet Structure
I NSTANCE C OUNTER
The Instance Counter is a one-byte value used to track the number of responses
generated by each Node ID. Instance Counter values are stored in the internal RAM
of the Gateway/Hub and are incremented by one following each response. If, for
example, the controller at Node 01 has generated 10 responses, the Instance
Counter value for Node 01 in the Gateway/Hub will read 10 (0x0A). When power is
cycled to the Gateway/Hub, the Instance Counter values for all nodes (and for the
Gateway/Hub itself) will be reset to zero (0x00).
NOTE: UHF-CNTL-IND-02 Controllers are capable of storing their own Instance
Counter values. Likewise, when power is cycled to either device, their Instance Counter
values will be reset to zero.