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MODBUS FUNCTION TABLES - Registers addressment (By the user)
────────────────────────────────────────────────────────────────────────────────────────────────────────────
Addr. (dec)
Description
46
SensorGasBit
(0x2E)
(Waiting time 200ms)
47
Spent sensor life
(0x2F)
48
Planned sensor life
(0x30)
49
Range Gas 1
(0x31)
50
Pre-alarm threshold
(0x32)
(Waiting time 200ms)
51
Alarm 1 threshold
(0x33)
(Waiting time 200ms)
52
Not used
(0x34)
53
L.E.L. Gas range 1 (X*10)
(0x35)
(valid for explosives gases)
54
Measure Gas 1
(0x36)
55
L.E.L. Measure Gas 1 (X*10)
(0x37)
(valid for explosives gases)
56-66
Not used
(0x38 - 0x42)
67
Temperature
(0x43)
68-76
Reserved
(0x44 -
0x4C)
ID Area addressing (By the user)
Addr. (hex)
Description
65280-65287
Client's product code
(0xFF00 –
0xFF07)
OEM distributor name
65288-65295
(0xFF08 –
0xFF0F)
Brand name
65296-65303
(0xFF10 –
0xFF17)
Firmware protocol number
65304-65305
(0xFF18 –
0xFF19)
Serial number
65306-65307
(0xFF1A –
0xFF1B)
Batch number
65308-65309
(0xFF1C –
0xFF1D)
SVN number
65310-65317
(0xFF1E –
0xFF25)
Notes
65318-65325
(0xFF26 –
0xFF2D)
Product family
65326
(0xFF2E)
SY-N000000SE 034969 310720
Modbus - Registers access (reading-3, writing-6)
Unit
Bit 0-4 (R) Detected Gas
0 =CH4, 1=VaporF., 2=CO, 3=LPG
Bit 5-7 (R) Not used
Bit 8 (R)
Gas category
0=Explosives, 1=toxic
Bit 9 (R)
Gas Range
0=Low, 1=High
Bit 10 (RW) Activates sensor end life signal
Bit 11-15 (R) Not used
(In days)
(In days)
[ppm]
[ppm]
[ppm]
Resolution 0,1%, (1000 = 100.0%)
[ppm]
Resolution 0,1%, (1000 = 100.0%)
Resolution 0,1°C, (100 = 10.0 °C)
Reserved
Unit
BYTE LOW
1 = GAS Family
BYTE HIGH
0-255 = Revision of modbus register map inherent to
the selected family.
Pag. 18/32
Range
Range
Byte
Register
Low
High
N°
N°
0
0x0400 2
1
0
65535
2
1
0
65535
2
1
0
65535
2
1
0
65535
2
1
0
65535
2
1
0
65535
2
1
0
1000
2
1
0
65535
2
1
0
1000
2
1
0
65535
2
1
0
65535
2
1
0
65535
2
8
Range
Range
Byte
Register
Low
High
N°
N°
0
65535
16
8
char
0
65535
16
8
char
0
65535
16
8
char
0
65535
4
2
0
65535
4
2
0
65535
4
2
0
65535
16
8
char
0
65535
16
8
char
0
65535
2
1
R/W
Modbus
Function
R/W
1,3,5
R
3
R
3
R
3
R/W
3,6
R/W
3,6
R
3
R
3
R
3
R
3
-
-
-
-
-
-
R/W
Modbus
Function
R
3
R
3
R
3
R
3
R
3
R
3
R
3
R
3
R
3
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