Eaton PowerXL DX-NET-SWD Manual

4 Commissioning4.4 Acyclic data50 DX-NET-SWD 06/13 MN04012009Z-EN www.eaton.com4.4.4.4 SmartWire-DT write request – Write jobOnly individual parameter writing is supported (i.e., array and multipleparameter writing is not supported). The maximum parameter request framelength is set at 16 bytes. The maximum length of a writable parameter is onedouble word. Various objects can be transmitted in the parameter channel –these objects are identified by what is referred to as a PNU (parameter num-ber) and a subindex. The write request includes a declaration that specifiesthat the job is a write job.Byte Designation Description0 Request Reference Request identification:Unique identification for a request/response pair for the master.The master can increment the identification number for each newrequest in the application. The DC1 variable frequency drive willthen echo it.01hex - FF hex (i. e. 1dec - 255 dec )1 Request ID Request ID:The type of request is specified here.02hex: Write job2 DO-ID Drive-Object-ID:00hex3 No. of Paramters Number of parameters:Only individual parameter processing is supported.01hex4 Attribute Attribute:Defines which object type should be accessed.10hex (16 dez ): Value5 No. of Elements Number of elements:Address of the parameter that should be accessedPNU 0 up to PNU 999: 00hex (only for subindex 0)PNU 0 up to PNU 999: 01hex6, 7 Parameter number Parameter number (PNU):Address of the parameter that should be accessed0000hex - FFFFhex (i. e. 0dec - 65535dec )8, 9 Subindex Subindex:Address of the parameter's first field element or start of the text0000hex - FFFFhex (i. e. 0dec - 65535dec )10 Format Format:01hex - 7Chex (→ 01 dec - 124 dec ): data type11 No. of Values Number of values: Number of values being accessed.01hex12 – (15) Value Value: Specifies the value of the parameter being accessed.The length depends on the format and can be a maximum of 4 bytes.00000000hex - FFFFFFFFhex (i. e. 0 dec - 4294967295dec )￫ In this case, the number of bytes is variable (13, 14, or 16) andwill depend on the selected format.