GE AF-650 GP Quick Installation Manual
Also see for AF-600 FP Series: Quick guideOperating instructionsDesign and installation guideOperating instructionsOperating instructions
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Contents
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5.2.5 Parameter HandlingThe PNU (Parameter Number) is translated from the register address contained in the Modbus read or write message. The parameter number is translated toModbus as (10 x parameter number) DECIMAL.5.2.6 Storage of DataThe Coil 65 decimal determines whether data written to the frequency converter are stored in EEPROM and RAM (coil 65 = 1) or only in RAM (coil 65 = 0).5.2.7 INDThe array index is set in Holding Register 9 and used when accessing array parameters.5.2.8 Text BlocksParameters stored as text strings are accessed in the same way as the other parameters. The maximum text block size is 20 characters. If a read request for aparameter is for more characters than the parameter stores, the response is truncated. If the read request for a parameter is for fewer characters than theparameter stores, the response is space filled.5.2.9 Conversion FactorThe different attributes for each parameter can be seen in the section on factory settings. Since a parameter value can only be transferred as a whole number,a conversion factor must be used to transfer decimals. Please refer to the Parameters section.5.2.10 Parameter ValuesStandard Data TypesStandard data types are int16, int32, uint8, uint16 and uint32. They are stored as 4x registers (40001 – 4FFFF). The parameters are read using function 03HEX"Read Holding Registers." Parameters are written using the function 6HEX "Preset Single Register" for 1 register (16 bits), and the function 10HEX "Preset MultipleRegisters" for 2 registers (32 bits). Readable sizes range from 1 register (16 bits) up to 10 registers (20 characters).Non standard Data TypesNon standard data types are text strings and are stored as 4x registers (40001 – 4FFFF). The parameters are read using function 03HEX "Read Holding Registers"and written using function 10HEX "Preset Multiple Registers." Readable sizes range from 1 register (2 characters) up to 10 registers (20 characters).Modbus TCP255 |
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