User Manual of EM730 Series Inverter (1) Modbus communication free mapping function By mapping any function code to the internal function code of the inverter, the Modbus communication function can be used normally without changing the original PLC program. To use the communication mapping function, F45.00=1 must be set. Otherwise, the function is invalid. To disable the mapping function, it can directly set F45.00=0. In total, it can be mapped 30 groups of function codes, and 3 function codes need to be set for each group: 1. Source address: Indicates the source address to be mapped 2. Destination address: the source address is mapped to an internal function code address 3.
Mapping coefficient: If the source address and destination address data have different decimal points, you can adjust the mapping coefficient. If the decimal points are the same, you do not need to change them. (2) Rules of Mapping address translation The mapping addresses are all set in base 10, and the conversion rules are as follows: Map F15.38 to F18.22. First, the source address F15.38 index 15 is converted to hexadecimal 0FH, and the sub-index 38 is converted to hexadecimal 26H, which is combined to 0F26H, and then converted to the corresponding decimal 3878.
Convert destination address F18.22 index 18 to hexadecimal 12H, sub-index 22 to hexadecimal 16H, synthesized to 1216H, and then converted to the corresponding hexadecimal 4630, then the function code is set as follows: F45.00=1 (mapping function valid) F45.01=3878 (source address F15.38) F45.02=4630 (destination address F18.22) (3) Mapping coefficient When the decimal points of the source address and destination address are inconsistent, it can be adjusted by the mapping coefficient. All parameters are readable.
Therefore, the mapping coefficient is set by default when reading parameters, which is automatically converted internally when writing parameters, and does not need to set the write coefficient separately. When reading inverter parameters, the data is multiplied by the mapping coefficient and sent to PLC; when writing parameters, the inverter receives the data and divides it by the 337 communication mapping 1：valid F45.01 Source address 1 0～65535 0 ● 0x2D01 F45.02 Destination address 1 0～65535 0 ● 0x2D02 F45.03 Mapping coefficient 1 0.00～100.00 1.00 ● 0x2D03