12
User Manual MOP301 Digital Moisture in Oil Immersion Probe
Please note:
The MOP301 may not be connected to any additional power supply when using the Modbus
configuration adapter HA011018.
HA011018
PC
Fig. 8 Configuration
Besides an individual probe naming, the communication parameters may be changed and the custom
Modbus map can be configured. Refer to chapter 5.4 Freely Configurable Custom Modbus Map.
There is a separate menu item for setting the oil parameters. An oil library with up to 50 entries may be
created. The library may be exported and imported and an appropriate parameter set may be uploaded to
the probe.
A 1- and 2-point adjustment may be carried out and the factory setup may be restored again. See chapter
6.3 Moisture and Temperature Adjustment and Calibration.
The configuration of an individual probe may be exported and imported.
5.2 Modbus Setup
Factory settings
Selectable values (via PCS10)
Baud rate
9600
9600, 19200, 38400, 57600, 76800, 115200
Data bits
8
8
Parity
Even
None, odd, even
Stop bits
1
1, 2
Modbus address
70
1...247
Tab. 2 Modbus default settings
Device address, baud rate, parity and stop bits can be set via:
1. PCS10 Product Configuration Software and the Modbus configuration adapter HA011018.
The PCS10 can be downloaded free of charge from
2. Modbus protocol in the register 1 (0x00) and 2 (0x01).
See Application Note Modbus AN0103 (available at
The serial number as ASCII-code is located in read-only registers 1 - 8 (0x00 - 0x07, 16 bits per address).
The firmware version is located in register 9 (0x08) (bit 15...8 = major release; bit 7...0 = minor release).
The sensor name is located in register address 10 (0x09).
Please note:
When reading the serial number or the sensor name, it is always necessary to read all 8
registers, even if the desired information requires less.
Please note:
For obtaining the correct floating point values, both registers have to be read within the same
reading cycle. The measured value can change between two Modbus requests, therefore exponent and
mantissa may get inconsistent.
Communication settings (INT16)
Parameter
Register number
1)
[Dec]
Register address
2)
[Hex]
Write register: function code 0x06
Modbus address
1
0x00
Modbus protocol settings
3)
2
0x01
1) Register number starts from 1.
2) Protocol address starts from 0.
3) For Modbus protocol settings see Application Note Modbus AN0103 (available at
).
Tab. 3 MOP301 communication settings registers
