Schneider Electric VW3 A3 303 user manual Read Device Identification 43 = 16#2B, Machine

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8. Modbus protocol

8. 10. Read Device Identification (43 = 16#2B)

Request:

Slave no.	2B	Type of MEI	ReadDeviceId	Object Id		CRC16
		0E	01	00	Lo		Hi
		0E	01	00


1 byte	1 byte	1 byte	1 byte	1 byte		2 bytes
Response:

	Slave no.	2B	Type of MEI	ReadDeviceId	Degree of conformity
	Slave no.	2B	0E	01	02
			0E	01	02

	1 byte	1 byte	1 byte	1 byte	1 byte

-------

-------	Number of additional frames				Next object Id		Number of objects
		00			00		04

		1 byte			1 byte		1 byte

-------	Id of object no. 1		Length of object no. 1		Value of object no. 1			-------
	00+		0D		“Telemecanique”

	1 byte		1 byte		13 bytes

-------

-------

-------

Id of object no. 2	Length of object no. 2	Value of object no. 2
01	0B	“ATV71HU15M3”

1 byte	1 byte	11 bytes

Id of object no. 3	Length of object no. 3	Value of object no. 3
02	04	“0201”

1 byte	1 byte	4 bytes

-------

-------

-------	Id of object no. 4				Length of object no. 4	Value of object no. 4	-------
	06				09	“MACHINE 4”

	1 byte				1 byte	9 bytes

-------	CRC16

	Lo		Hi

	1 byte		1 byte

The total response size given in this example equals 55 bytes.

The response contains the following four objects:

•Object no. 1: Manufacturer name (always "Telemecanique", i.e., 13 bytes).

•Object no. 2: Device catalog number (ASCII string; for example: “ATV71HU15M3”, i.e., 11 bytes).

The length of this object varies according to drive type. Use the “Length of object no. 2” field to determine the length.

•Object no. 3: Device version, in "MMmm" format where "MM" represents the determinant and "mm" the subdeterminant (4-byte ASCII string; for example: "0201" for version 2.1).

•Object no. 4: Device name (ASCII string; for example: "MACHINE 4", i.e., 9 bytes).

The length of this object varies according to the device name assigned to the drive (the latter being configured by the user): [7. DISPLAY CONFIG.] menu, [7.1 USER PARAMETERS] submenu, [DEVICE NAME] parameter.

This menu can only be accessed in Expert mode. Maximum size 16 bytes.

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Contents Altivar Contents Before you begin Electric shock will result in death or serious injuryInstallation Manual Documentation structureProgramming Manual Communication Parameters ManualNotation IntroductionPresentation Hardware setup Installing the card in the driveReceipt Hardware descriptionCoding the address Switch codingChoosing polarization Address 1234Modbus RS485 standard Connecting to the busWiring recommendations Connection cables Connection via RJ45 wiring systemConnection accessories Connection cables for the master Type of master Master interface Description Catalog numberTWD XCA RJ030 TSX SCP CMConnection via junction boxes Description Catalog Number Subscriber socketRS485 double shielded twisted pair CablesTSX CSA500 TSX P ACCConfiguration Communication parametersControl Command Control via Modbus in I/O profileControl via Modbus or the terminals in I/O profile Parameter Value CommentControl via Modbus in Drivecom profile Control via Modbus or the terminals in Drivecom profileConfiguration Example of configuration via the graphic display terminal Communication scannerRDY NET COM. Scanner InputCommunication faults COM. Fault ManagementCONFIG. COMM. MAP Monitored parametersFormat Format Range Terminal displayDiagnostics Checking the addressLEDs Green RUN Red ERR Meaning Corrective actionRUN NET Communication MAPCOM. Scanner Input MAP COM Scan Output MAP CMD. Word ImageCOM Scan Output MAP Input variable Scanner parameterOutput variable Scanner parameter Communication fault Card faultSlave Slave j Slave k Modbus protocolPrinciple RTU mode Ascii modeModes Slave address Function code DataCode Modbus name Description Broadcast Size of data Modbus functions availableRead Holding/Input Registers 3/4 Write Single Register Diagnostics Get Comm Event Counter 11 = 16#0B Write Multiple Registers 16 = 16#10Read/Write Multiple Registers 23 = 16#17 Read Device Identification 43 = 16#2B MachineExample of positive response MEICode Modbus name Description Size of data Output variables Logic address Default assignmentInput variables Logic address Default assignment Parameter Logic Input variable address Logic address Default valueParameter Logic Read Output control Parameter assignedInput monitoring Value Parameter assignedResponse Code Error codeException responses Read non-existent or protected parameters Logic address Parameter ValueAppendix RS485 standardModbus 2-wire standard schematic MasterModbus 4-wire standard schematic Uni-Telway schematic Wire Jbus schematic Type of trunk cable Cable with 1 shielded twisted pairRecommendations Creating a Modbus bus using non-standard equipmentDifferent scenarios Calculating the polarization ExampleRS485 schematic for the card Card connector pinoutContact no. Signal SUB-DAtv71ModbusJbusENV1 2005-05