Analog Output 1 (0X0000); Operating Mode (0X0001) - MSA Ultima OPIR-5 Programming Manual

Addr.
Name
(Hex)
Alarm Event
00DFh
Count
00E0h
Reserved
– 00FF

3.1 Analog Output 1 (0x0000)

A read returns a value of the LEL output current in microamps.

3.2 Operating Mode (0x0001)

This read/write accessible register reports the current operating mode for the Ultima OPIR-5
Detector. A Read command returns the present Ultima OPIR-5 Detector mode, represented by the
enabled bit. The following table shows the mode represented by each bit in the 16-bit register.
Table 9: Bitmap for Operating Mode Register (Read-Only Access)
Bit Position 7
Mode
Not
Used
Description
Hex Value
0x0080
Decimal Value
128
Bit Position 15
Mode
Not
Used
Description
Hex Value 0x8000
Decimal Value 32768
A Read command returns the present ULTIMA OPIR-5 mode, represented by the enabled bit.
Descriptions of the modes are provided below.
•
Run Mode: Ultima OPIR-5 Detector normal operation mode, with LEL measurement taking
place. Writing 1 to mode register allows to abort zero/calibration/gas check, if gas concentration
is less then 5% of Full Scale
•
Zero Mode: Zeroing of the Ultima OPIR-5 Detector in progress. Writing 0x0004 to mode
register sends the unit to zero mode.
•
Startup Mode: Ultima OPIR-5 Detector is initializing during powerup.
•
Alignment Mode:
installation to align the receiver and transmitter. At the end of alignment mode, the mode
switches to Zero Mode to compensate for background gas levels.
Ultima OPIR-5 Modbus Programming Guide
Function
Total Alarm Event Count
N/A
6 5
Startup Not Not
Mode Used Used
0x0040 0x0020 0x0010
64 32 16
14 13 12
Not Not Not
Used Used Used
0x4000 0x2000 0x1000
16384 8192 4096
Ultima OPIR-5 Detector is in alignment mode. This is used during
15
Data
Data Range
Type
Numeric
0 - 65535
Value
N/A N/A
4 3 2
Not Zero
Used Mode
0x0008 0x0004
8 4
11 10
Not
Not
Used
Used
0x0800 0x0400
2048 1024
R/W
R
N/A
1 0
Not Run
Used Mode
0x0002 0x0001
2 1
9 8
Gas Align
Check Mode
0x0200 0x0100
512 256