Eaton PowerXL DX-NET-SWD Manual

4 Commissioning4.4 Acyclic dataDX-NET-SWD 06/13 MN04012009Z-EN www.eaton.com 494.4.4.3 SmartWire-DT write request – Read jobOnly individual parameter reading is supported (i.e., array and multiple param-eter reading is not supported). The parameter request’s frame length is set at10 bytes.Various objects can be transmitted in the parameter channel – these objectsare identified by what is referred to as a PNU (parameter number) and a sub-index. The write request includes a declaration that specifies that the job is aread 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.They are ten mirrored by DC1 variable frequency drive.01hex - FFhex (i. e. 1 dec - 255 dec)1 Request ID Request ID:The type of request is specified here.01hex: Read request2 DO-ID Drive-Object-ID:00hex3 No. of Paramters Number of parameters:Only individual parameter processing is supported.01hex.4 Attribute Attribute:Defines which object type should be accessed.10hex (16dez ): Value5 No. of Elements Number of elements:Number of vector elements or length of the string being accessed.PNU 0 up to PNU 999: 00hex (only for subindex 0)PNU 0 to PNU 999 (without 202): 01hex6, 7 Parameter number Parameter number (PNU):Address of the parameter that should be accessed0000hex - FFFFhex (i. e. 0 dec - 65535dec )8, 9 Subindex Subindex:Address of the parameter’s first field element or start of the text0000hex - FFFFhex (i. e. 0 dec - 65535dec )￫ In this case, the number of bytes is always 10.