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GASSONIC OBSERVER-i
61
6.7.
Gassonic Observer-i Command Register Details
6.7.1. Analog
(00H)
A read returns a value which is proportional to the 0-20 mA output current. The current is based on a
16-bit value. The number represents the current in microamps (
μ
A).
6.7.2. Mode
(01H)
A read returns the Gassonic Observer-i status mode.
Bit Position
15
14
13
12
11
10
9
8
Fault
Description
Not
Used
Not
Used
Not
Used
Not
Used
Not
Used
Alarm
Mode
Piezo
Cal
Cal
Pending
Hex Value
0x8000
0x4000
0x2000
0x1000
0x0800
0x0400
0x0200
0x0100
Decimal Value
32768
16384
8192
4096
2048
1024
512
256
Bit Position
7
6
5
4
3
2
1
0
Fault
Description
Alarm
Test
SB100
Test
Setup
Mode
Fault
Mode
Cal
Mode
Acoustic
Test
Run
Mode
Startup
Mode
Hex Value
0x0080
0x0040
0x0020
0x0010
0x0008
0x0004
0x0002
0x0001
Decimal Value
128
64
32
16
8
4
2
1
Table 13: Operation Status Mode
READ:
A read request to this register returns the present Gassonic Observer-i operating mode represented by
the enabled bit. Descriptions of the modes are provided below:
•
Startup:
Gassonic Observer-i initialization during the power-up cycle.
•
Run:
Normal operating mode of the instrument.
•
Acoustic Test:
This bit is set anytime an acoustic test is taking place. The request of the
acoustic test can be from the magnet, a timed acoustic test, a HART request or a Modbus
request.
•
Calibrate:
This bit is set anytime a calibration is taking place. The request of the calibration
test can be from the magnet, a timed acoustic test, a HART request or a Modbus request.
•
Fault:
This bit is set any time the Gassonic Observer-i has a fault.
•
Setup:
Indicates the user has activated a magnet and is in setup mode.
•
SB100 Test:
Indicates someone has activated the SB100.
•
Alarm Test:
This indicates someone has activated the alarm test. This can be done via a
remote switch, HART, or Modbus.
•
Calibration Pending:
The Cal pending bit is used to indicate an intermediate state.
•
Piezo Calibration:
This bit is not used in normal operation. It is used only when the piezo or
microphone is replaced. It is set when the technician calibrates the piezo.
•
Alarm:
This bit is used when the Gassonic Observer-i detects dB greater than the trigger
level. If the Observer-i is latched it will stay in alarm mode until the reset relay is activated.
•
Show Rev:
This bit is set during the time someone has activated the show rev by using an UP
& DOWN magnet.
WRITE:
A write to the mode register (01) with the proper bit set will cause the Gassonic Observer-i to change
modes. Not all modes can be activated in this manner. If an improper bit or the action is not allowed at