SEC 3120 16-bit Modbus Manual
Page 4 Of 46
Sensor Electronics Corporation
For Version 1.2 and above
December 2012
P/N 1580282, Rev. 1, 20121228
Overall SEC 3120 Modbus Register Map
Internal
Register
Modbus Holding
Register
Region Description
00000 - 01999
40001 - 42000
Reserved for coil registers- future
02000 - 02099
42001 - 42100
16-bit Sensor ALL apply region (region 0)
02100 - 02199
42101 - 42200
16-bit Sensor 1 region
02200 - 02299
42201 - 42300
16-bit Sensor 2 region
02300 - 02399
42301 - 42400
16-bit Sensor 3 region
02400 - 02499
42401 - 42500
16-bit Sensor 4 region
02500 - 02599
42501 - 42600
16-bit Sensor 5 region
02600 - 02699
42601 - 42700
16-bit Sensor 6 region
02700 - 02799
42701 - 42800
16-bit Sensor 7 region
02800 - 02899
42801 - 42900
16-bit Sensor 8 region
02900 - 02999
42901 - 43000
16-bit 3120 unit region (region 9)
03000 - 03999
43001 - 44000
Reserved for SEC HMI Legacy
04000 - 04999
44001 - 45000
Reserved for SEC HMI Legacy
05000 - 05499
45001 - 45500
Reserved for SEC 32-bit future
05500 - 05999
45501 - 46000
Reserved for SEC 32-bit future
06000 - 06999
46001 - 47000
Reserved for future use
07000 - 07499
47001 - 47500
Reserved for SEC 32-bit future
07500 - 07999
47501 - 48000
Reserved for SEC 32-bit future
08000 - 08999
48001 - 49000
Reserved for SEC HMI Advanced SID
09000 - 09998
49001 - 49999
Reserved for SEC HMI Legacy
Memory Map – 16-bit Interface Holding Registers Overview
The SEC 3120 implements the 16-bit Modbus interface by breaking the address
region into ten classes (unit and sensors) and eight plus one sensor sub-regions (each
sensor region repeats the same command set with the same relative offsets) as shown
previously.
Region 0 applies a sub-set of written values to ALL logical sensors, while regions
1 – 8 apply to each individual logical sensor, and region 9 contains 3120 unit specific
(non-sensor) information. The entire 16-bit region is shown previously in green.
Within the sensor regions, the same information/register address offsets are
repeated, containing gas concentration, alarm set points, sensor status, etc. (relative
offsets 42x01 – 42x99, where x = sensor number 1 – 8).
Within the unit specific region (9), the holding register addresses are absolute (42901 =
operating status, 42902 = fault relay reason code, etc.).
Summary of Contents for SEC 3000
Page 15: ...Doc 1460003 Rev A Operation Manual SEC 3000 Electro Chemical Gas Sensor Page 12 of 13 ...
Page 54: ...Part Number 3100 EXP MANUAL REV 11 20141007 FIGURE 4 SEC 3100 SEC Millenium Mounting ...
Page 55: ...Part Number 3100 EXP MANUAL REV 11 20141007 FIGURE 5 SEC 3100 SEC 3000 Mounting ...
Page 56: ...TB 1 J1 TB 2 J2 1 6 1 6 1 4 1 6 TB 5 J5 TB 6 J6 ...
Page 148: ...SEC 3120 Wiring TB 1 P3 TB 2 P6 1 6 1 6 1 2 3 4 1 2 3 4 7 6 5 4 3 2 1 TB 3 P1 TB 4 P5 ...
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Page 399: ...SEC P N 1460014 Rev ECO A 000209 Page 11 of 26 ...
Page 400: ...SEC P N 1460014 Rev ECO A 000209 Page 12 of 26 ...
Page 431: ...Part Number 1460005 Revision C ...
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