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Device information (INT16)
Parameter
Read register: function code 0x03 / 0x04
Serial number (as ASCII)
Firmware version
Sensor name
Device status (bit decoded)
1) Register number starts from 1.
2) Protocol address starts from 0.
3) See chapter 5.5 Device Status Indication.
Tab. 4 MOP301 device information registers
5.3
Modbus Register Map
The measured data is saved as a 32 bit floating point values (data type FLOAT32) and as 16 bit signed
integer values (data type INT16).
FLOAT32:
Parameter
Read register: function code 0x03 / 0x04
Water activity aw
Water content x
Temperature T
Saturation
Oil parameter A
Oil parameter B
Write register: function code 0x10
3)
Oil parameter A
3)
Oil parameter B
1) Register number starts from 1
2) Register address starts from 0
3) Examples: Writing Parameter A -2663.30005 decimal: 46 10 00 64 00 02 04 74 CD C5 26 E3 44
Writing Parameters A and B -1663.30005 and 7.3705 decimal: 46 10 00 64 00 04 08 E9 9A C4 CF DB 23 40 EB CA 19
If two parameters are to be uploaded, it is recommended to write them with a single command.
Tab. 5 MOP301 FLOAT32 measured data registers
INT16 (read register):
Parameter
Read register: function code 0x03 / 0x04
Water activity aw
Water content x
Temperature T
Saturation
1) Register number starts from 1
2) Register address starts from 0
3) Examples: For scale 100, the reading of 2550 means a value of 25.5. For scale 50, the reading of 2550 means a value of 51.
Tab. 6 MOP301 INT16 measured data registers
5.4
Freely Configurable Custom Modbus Map
It is possible to map measured value/status registers arbitrarily in a block with up to 20 registers provided
for this purpose. This means that registers of interest may be mapped in an area with consecutive
registers, so that important values can be queried with a single command in one block.
The custom map can be configured via:
1. PCS10 Product Configuration Software and the Modbus configuration adapter HA011018.
The PCS10 can be downloaded free of charge from www.epluse.com/pcs10.
2. Modbus protocol commands, refer to the example in chapter 5.6 Modbus RTU Examples.
User Manual MOP301 Digital Moisture in Oil Immersion Probe
Register number
3)
Unit
Register number
-
ppm
°C
°F
%
-
-
-
-
Unit
Scale
-
1000
ppm
0.1
°C
100
°F
50
°K
50
%
10
1)
[Dec]
Register address
1
9
10
602
1)
[Dec]
1135
1141
1003
1005
1137
0224
0226
0101
0103
3)
1)
Register number
[Dec]
4068
4071
4002
4003
4005
4069
2)
[Hex]
0x00
0x08
0x09
0x259
2)
Register address
[Hex]
0x46E
0x474
0x3EA
0x3EC
0x470
0xDF
0xE1
0x64
0x66
2)
Register address
[Hex]
0xFE3
0xFE6
0xFA1
0xFA2
0xFA4
0xFE4
13
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