Testing VT SCADA (the light version) to see if it can be used to manage several irrigation canal systems using Control Design CD120 RTU's. These are FM radio devices. They have a range of registers (47033-423039) designated for floating point value storage. These are 32 bit (4 byte) registers.
For example, modbus ID 20, register 47033 (0-based) currently contains the value 1.4839. A query using the manufacturer's software goes out as:
20 3 27 120 0 1 0 50
The response is
30 3 4 63 189 240 111 38 238
Which the software correctly decodes that as 1.4839
How can I configure VT Scada to poll these single 32 bit floating point registers? I am connected to the RTU with VT Scada and can correctly poll integer values, but the response I get from the floating point registers is incorrect.
Thanks for any assistance.