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Digital Electronics Corporation General SIO

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1Digital Electronics CorporationGeneral SIODriver1What Is a General SIO?...................................................................................................32System Configuration.......................................................................................................53External Device Selection................................................................................................94Communication Settings................................................................................................105Setup Items....................................................................................................................136Cable Diagrams.............................................................................................................167Supported Devices.........................................................................................................448Device Code and Address Code....................................................................................459Error Messages..............................................................................................................4610Direct Communication Function.....................................................................................4811Sample Program............................................................................................................60General SIO DriverGP-Pro EX Device/PLC Connection Manual2IntroductionThis manual describes how to connect the Display and the External Device (target PLC).In this manual, the connection procedure is described in the sections identified below.1System ConfigurationThis section lists the types of External Devices and SIO that you can connect.�"2 System Configuration" (page 5)2External Device SelectionSelect the model (series) of the External Device and its connection method.�"3 External Device Selection" (page 9)3Communication SettingsThis section shows setting examples for communicating between the Display and the External Device.�"4 Communication Settings" (page 10)4Setup ItemsThis section describes communication setup items on the Display.Set the Display's communication settings in GP Pro-EX or in offline mode.�"5 Setup Items" (page 13)Operation5Cable DiagramsThis section shows cables and adapters for connecting the Display and the External Device.�"6 Cable Diagrams" (page 16)General SIO DriverGP-Pro EX Device/PLC Connection Manual31What Is a General SIO?1.1OverviewThe general SIO driver is a driver which can be used for general purpose and not dedicated to specific SIO communication devices connected to the Display. It is suitable for devices with simple communication procedures, such as temperature controllers, card readers, barcode or serial printers. Through the Display's D-script and ladder program (hereinafter referred to as “scripts”), communication packets are created as data in the Display's memory table. The general SIO driver then sends the memory table data to the Display's SIO port, and stores data received from the SIO port in the Display's memory table.As described above, the communication packets themselves are created using scripts and this driver enables you to send and receive data to and from SIO communication devices using only Send/Receive functions through the SIO ports.•1:1 and 1:n serial connections are available.•Up to 31 units can be connected.•The maximum communication speed is 115200bps.•The general SIO driver features a memory link method. You can set a single memory link driver for each Display. Two or more memory link drivers are not available for simultaneous use.For more information on the memory link method, see the GP-Pro EX Device/PLC Connection Manual. In the Manufacturer’s List section, see "Communication with External Device".General SIO DriverGP-Pro EX Device/PLC Connection Manual41.2GlossaryTermsDefinition and DescriptionMemory tableA Display’s internal memory table. The General SIO driver reads and writes data to and from the memory table. The system area has a 16-bit wide region of 0000 to 9999.ScriptsThis manual uses "scripts" as a generic term to indicate the function that reads and writes data to and from the memory table. Specifically, "scripts" represents a D-script and a ladder program.Ring bufferThis memory region stores data temporarily in the FIFO format. The term "Ring Buffer" comes from the way data is read circularly. This driver creates a ring buffer in the Display's memory table and uses it as a receive buffer. To keep track of data position in a receive buffer, you control two pointers: the GET and PUT pointers.GET pointerThis pointer indicates the location of the next piece of data that scripts should read out. This driver holds the offset value from the start address of the data area located in a ring buffer. Scripts read data from the region that the GET pointer indicates, then moves the GET pointer forward to the read-out position.PUT pointerThis pointer indicates the location where this driver should write the next piece of incoming data. This driver holds the offset value from the start address of the data area located in a ring buffer. This driver writes incoming data into the region that the PUT pointer indicates, then moves the PUT pointer forward to the write position.Receive-function control areaThis area contains all management information for the receive buffer of this driver, and is defined within a fixed region in the Display's memory table.Send-function control areaThis area contains all management information for the send buffer of this driver, and is defined within a fixed region in the Display's memory table.System data areaThis area, in the Display's memory table, reflects its system information. Here you can read or write display screen numbers, calendar information, and other system information. This area is created within the fixed addresses (0000 to 0019) in the memory table.Special relayLike the system data area, this relay is a region located within the memory table and reflects the system information of the Display. This relay is created within the 2032 to 2047 fixed address range.9000 areaThis area mainly stores the Display's internal-processing information, such as line-graph logs and the communication scan time. Some of the regions are editable by the user.User areaThis area, in the Display's memory table, reflects its system information and contains memory regions other than the "system data area", "special relay", and "9000 area" regions. The regions are editable by the user.General SIO DriverGP-Pro EX Device/PLC Connection Manual52System ConfigurationThe following table lists system configurations for connecting External Devices and the Display.Connection Configuration•1:1 Connection•1:n ConnectionSeriesCPULink I/FSIO TypeSetting ExampleCable DiagramExternal DeviceRS-232CSetting Example 1 (page 10)Cable Diagram 1 (page 16)RS-422/485 (4-wire)Setting Example 2 (page 11)Cable Diagram 2 (page 20)RS-422/485 (2-wire)Setting Example 3 (page 12)Cable Diagram 3 (page 31)DisplayExternal DeviceExternalDeviceExternalDeviceDisplayExternalDeviceMaximum 31 units

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