NAiS GT01 Technical Manual
Also see for GT01: Technical manual
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Contents
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GT seriesSetup243.2 Setting the Basic Communication Area Between the GT01 and PLC3.2 Setting the Basic Communication Area Between theGT01 and PLC3.2.1 What is the Basic Communication Area?Communication between the GT01 and PLC is carried out as shown below.PLCInternal PLC devicesPart reference / output deviceFor part functions(free device specification)Basic communication areaFor screen switching settings and systemcontrol(word device / bit device: 3 words each)OngoingCommunicationAs shown in the illustration, communication is carried out on an ongoing basis betweenthe GT01 and internal devices in the PLC. Internal PLC devices are divided into thefollowing two devices:Basic communication areaThis area is for system control, such as screen switching settings. PLC devices belongto this area on a fixed basis, and communication is constantly being carried out.Breakdown of the basic communication areaWord devices (DT, FL, etc.)3 consecutive wordsBit devices (WR, etc.)3 consecutive words- Word devices - - - For reading devices handled in word units (3 consecutive words)- Bit devices - - - For reading devices handled in bit units (3 consecutive words)References and output devices for partsThese are devices that are used in parts functions, and can be freely specified by theuser. Communication is carried out on an ongoing basis only for those that are currentlydisplayed on the screen and pertain to devices currently in use.With the GT01, before GTWIN screen creation tool is used to specify the devices forparts functions, the “basic communication area” must be determined.DT0 to DT2 and WR0 to WR2 are set as the default values for the basic communicationarea, but the initial address can be changed using the following procedure.CAUTIONThe basic communication area should be used in the PLC ladderprogram to control the GT main unit. |
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