Schneider Electric VW3A3310d user manual IO Scanning service, Periodic variables

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12. IO Scanning service

12. 1. Presentation

The IO Scanning service is used to exchange periodic I/O data between:

•A controller or PLC (IO Scanner).

•Devices (IO Scanning servers).

This exchange is usually performed by implicit services, thus avoiding the need to program the controller (PLC). The IO Scanner periodically generates the Read/Write Multiple Registers (23 = 16#17) request.

The IO Scanning service operates if it has been enabled in the PLC and the drive.

The drive parameters assigned to IO Scanning have been selected by default. This assignment can be modified by configuration.

The table below indicates the tools which can be used to modify these configurations:

Functions	Graphic display	Integrated	PowerSuite	Standard
	terminal	display	software	web server
		terminal	workshop
Enable IO Scanning	p	p	p	p
Configuring the IO Scanning variables			p	p

The drive IO Scanning service can also be configured by the Ethernet card Modbus server.

When the IO Scanning service has been enabled in the Altivar 61/71 drive:

•A TCP connection is assigned to it.

•The parameters assigned in the periodic variables are exchanged cyclically between the Ethernet card and the drive.

•The parameters assigned to the periodic output variables are reserved for IO Scanning. They cannot be written by other Modbus services, even if the IO Scanner is not sending its periodic output variables.

12. 2. Periodic variables

	Output variables (written by IO Scanner)
No.	Meaning/default assignment	Configurable
0	Reserved	no
1	Control word (CMd)	yes
2	Speed setpoint (LFrd)	yes
3	Not assigned	yes
4	Not assigned	yes
5	Not assigned	yes
6	Not assigned	yes
7	Not assigned	yes
8	Not assigned	yes
9	Not assigned	yes
10	Not assigned	yes
11-31	Reserved	no

It is possible to configure the assignment of periodic variables 1 to 10.

	Input variables (read by IO Scanner)
No.	Meaning/default assignment	Configurable
0	Reserved	no
1	Status word (EtA)	yes
2	Output speed (rFrd)	yes
3	Not assigned	yes
4	Not assigned	yes
5	Not assigned	yes
6	Not assigned	yes
7	Not assigned	yes
8	Not assigned	yes
9	Not assigned	yes
10	Not assigned	yes
11-31	Reserved	no

Note: • Avoid configuring the drive configuration parameters as periodic output variables because they cannot be modified with the motor running (DSP 402 state 5—"Operation Enabled”).

• Monitoring parameters must not be configured as periodic output variables, because they cannot be written.

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Contents Altivar 61 Page Table of contents Table of contents Important Information Please NoteBefore you begin Hazard of Electric SHOCK, EXPLOSION, or ARC FlashInstallation Manual Documentation structureProgramming Manual ATV61Presentation IntroductionNotation Hardware setup Installing the card in the driveReceipt Hardware descriptionConnecting to the Ethernet network Card RJ45 connector pinoutPin Signal Example of connection to an Ethernet networkEthernet network connection elements Access to Ethernet menu via graphic display terminal Access to Ethernet menu via the integrated display terminalEthernet menu ENTEthernet menu parameters Code Description IPP IPP1 0.0.0 0 0 0 IPP2 IPP3IPP4 IPFFdrA FdrSFdrt FdrEConfiguration List of functions to be configuredConfiguring IP addresses Power-up InitializationAssigning IP addresses Static Addressing DynamicConfiguring Bootp Configuring FDREntering IP addresses in the terminal IP card IPC1 IPC2 IPC3 IPC4 IP Mask IPM1 IPM2 IPM3 IPM4Configuring IO Scanning Reserving controlConfiguring the control Control via Ethernet in I/O profileControl via Ethernet or the terminals in I/O profile Parameter Value CommentControl via Ethernet in CiA402 Drivecom profile Control via Ethernet or the terminals in CiA402 profileProfile Separate Configuring communication interruption management Communication monitoringNetwork management CommunicationCOM. Fault Management External FaultDrive response RDY NETConfiguring monitored parameters Format Range Terminal displaySignalling LEDs DiagnosticsColor/ state Description Available information Monitoring the controlIntegrated display Terminal Workshop Web serverTroubleshooting communication interruptions Ethernet communication interruption typeExtended communication interruption CodeTroubleshooting the card Software setup List of services supportedClient Service Number of connections TCP connectionsUnit ID Modbus TCP server Accessible parameters Modbus TCP serverModbus TCP frames Drive Modbus serversAddress Size Description Access Possible values, comments Ethernet card parametersIPC1.IPC2.IPC3.IPC4 IPM1.IPM2.IPM3.IPM4IPP1.IPP2.IPP3.IPP4 IPF1.IPF2.IPF3.IPF4FDR autosave List of Modbus functions supported Read Holding Registers 3 functionCode Modbus name Description Size of data Decimal Byte MeaningWrite Single Register 6 function Write Multiple Registers 16 = 16#10 function Read/Write Multiple Registers 23 = 16#17 function 16#17Read Device Identification 43 = 16#2B function Bytes Meaning With the VW3A3310d Ethernet cardIO Scanning service Periodic variablesAddress Description Default value Address tableFDR service Local configuration Downloaded configuration Drive parameters configurationFirst use IP assignment Save DownloadingSave the drive configuration parameters in the FDR server Replacing a driveDownload the IP addresses Check that the system is operationalOther commands Configuration filePeriodic saving LimitationsHome menu Monitoring menu Diagnostics menu Setup menu Security submenu Documentation menuStandard web server Web server functionsApplets Access to the web server Username and passwordHome menu Web server user interfaceMonitoring menu Altivar Viewer Data Viewer Altivar Chart Diagnostics menuSetup menu Ethernet StatisticsHttp password and Data write password pages FDR Agent Lcfg = No nOLocal Config File ErrorError Code Restore CounterIO Scanner Enabling IO Scanning Assigning the IO Scanning periodic variablesTime out MasterMail Important NoticeDocumentation menu Access FTP serverFunctions File systemFTP functionality Comment DIRDownloading from the web server PrincipleFile management File name 32 characters maxWeb server Standard web server resources Type File name Size Complete URL BytesType File name Complete URL BytesPresentation Snmp agentTree structure Objects handled Objects Description Access Default valueATV Setup using PL7 Defining the hardware configurationBootp configuration Modbus Configuring Modbus messagingMulti Configuring periodic variables PLC Configuring the Dhcp address server FDR Setup using Concept Setup using ProWORX NxT Hardware configuration Traffic Cop Network configurationTCP/IP configuration O Scanner configuration Page 30072-452-37 2008-02