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Fig. 128 Polling slave device configuration
In the slave property, enter the device name, bind to the Port1, enter the slave address and polling interval, enable merge collection
function, the description of the configuration parameters on this interface is shown in table 14. We use the temperature and humidity
THsensor as an example to describe the process. After finishing configuring the slave device, please scroll down to the bottom of the
page and click on "Save" button to save all the changes that you have made. All configurations take effect after a system reboot.
9.2. Add modbus data points
9.2.1. Register type and offset
Table 22 Typical Register Tables
Read, function code 0x1,0x5,0xF, bool values
Read only, function code 0x2, bool values
Read only, function code 0x4, int,uint,float values
Read/Write, function code 0x3,0x6,0x10,int,uint,float values
The Modbus register addressing starts with register 0, but some device manufacturers start with the number 1 in the device
documentation. In this case, the number minus 1 should give the correct register address. Offsets can be represented in different
ways. Sometimes as Hex values and sometime the offset will also contain the register type. For example Offsets in the Holding
Register range might start with a 4 such as 411001, in the SCADA this would be entered as 11001.
9.2.2. Raw data types and byte order
A standard Modbus Holding Register or Input Register is a 16 bit (2 Byte) value. Often this is not enough so different equipment will
utilize multiple modbus registers to hold a larger value. Here is a list of Data Types supported in the M100 gateway.
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