Eaton EU5C-SWD-EIP-MODTCP Manual

Also see for EU5C-SWD-EIP-MODTCP: Application Instruction leaflet Instruction leaflet Instruction leaflet Instruction leaflet

Contents

8 What you need to know about SmartWire-DT8.4 Cyclical input and output data of the SWD modules88 SmartWire-DT Gateway EU5C-SWD-EIP-MODTCP 08/17 MN120003Z EN www.eaton.com8.4 Cyclical input and output data of the SWD modulesAll the inputs and outputs of the SWD modules that are present are stored ina data storage area inside the SWD coordinator. This data storage area isreferred to as the "process image. " The input data can have a maximum sizeof 800 bytes, while the output data can have a maximum size of 642 bytes.In total, the data area must not exceed 1000 bytes. The cyclic exchange ofdata between the SWD coordinator and the SWD modules takes place in acommon data frame.The input data can consist of several bytes, dependingon the module. This input data contains information such as switch positionsand diagnostic information.The modules' input and output data is available to the PLC programmingenvironment. To find out more about how it can be accessed, please refer to￫ Section “6.2 Manufacturer-specific object classes”, page 63.Diagnostics possibilitiesThe SWD coordinator can provide the following diagnostic information:• Cyclic diagnostic information• Extended diagnostics informationCyclic diagnostics informationSmartWire-DT provides you with cyclical diagnostic information. This infor-mation can be evaluated in the program and used for further control tasks.This basic diagnostic information is coded in the normal process image ofeach SWD module. The information about whether the SWD module isexchanging data normally or whether diagnostic alarms are currently presentis provided on all SWD modules in the first input byte (byte 0) at bit positions4 and 6.Example of input and diagnostic dataThe M22-SWD-K11-LED-R function element has a red LED for illuminatedpushbuttons and the two switch states 0 and 1. With cyclical input data ofone byte, it contains information on switch position and diagnostic informa-tion.Byte 0: DANGERPersons, systems and machines may be put at risk if an N/Ccontact is misinterpreted. When using N/C contacts alwaysevaluate the PRSNT and DIAG diagnostic bits of this module.7 6 5 4 3 2 1 0Diagnostic data Input dataSUBST PRSNT – DIAG – – NO1 NC1