Powell BriteSpot BSG3, Instruction Bulletin

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32 Usage
01.4IB.48040C
BriteSpot™ BSG3
Table P Basic Ethernet I/P Queries
Type
Read Ch 1
Temperature
°C
Read
Client ID 1,
Ch 1
Temperature
°F
Read FW
revision
Connection User Info User Info
Device
Info (101)
Array Offset 18 36 - 53 3
d. S
peciAl
r
egiSterS
There are several special register types that
warrant particular attention when polling the
BriteSpot™:
1) Status Registers Interpretation
The Status Registers provide a generic
set of status codes for each channel
independently. These codes can identify
one of several problems that may need to
be rectified. In general, the Status Registers
provide more detailed description when
problems arise. The status registers can be
accessed via MODBUS (See Appendix A ) or
through the LCD screen (BSG3.9S only).
Table Q Status Register Error Codes for
BriteSpot™ Channels
Status Register Value Description
0 No Errors
1
Optical Probe not detected
(broken or not connected)
2 Optical signal too weak
4 Temperature out of range
8
BriteSpot™ module is still
initializing
2) Alarm & Warning Registers
Each temperature channel on the G3
Conversion Module is equipped with a pair
of registers that are used to indicate that
the temperature has exceeded a predefined
threshold. In some cases, users may prefer
to just monitor these registers and take
action if they become active. The lower
threshold, called the Warning Register,
is typically set 10-15⁰C below the Alarm
Register. The location of the
Warning/Alarm registers can be found in
Appendix A .
a. Operation
Each bit for the alarms is found in a 16
bit Input Register that is packed from
Least Significant Bit (for Sensor
Channel 1) to Most Significant Bit
(For Sensor Channel 16). BSG3.18
have additional registers for the last
2 channels. If no Warnings or Alarms
are set on any of the channels, all the
associated registers will read as “0”.
See Appendix A for details.
Example: Reading Input Register
30055
Table R Example Warning Flag
Input Register
Address (Name) Integer
Hex Binary
30055
(W Flag L)
64 0x 0000
0b 0000 0000
0100 0000
In the case above, the bit that is set
refers to the Warning Register for
Sensor 7. A similar register for the
Alarm flags is also available. Therefore,
in the example above, Sensor 7 has
exceeded the warning threshold.