Schneider Electric VW3 A3 303 user manual Example of positive response, Mei

8. Modbus protocol

Negative response specifically related to the identification function:

Slave no.	2B + 80	Type of MEI	Error code		CRC16
	AB	0E	00 to 02	Lo		Hi
1 byte	1 byte	1 byte	1 byte	1 byte		1 byte
Error code:	16#00 =	No error

16#01 = The "Request code" (16#2B), the "Type of MEI" (16#0E) or the "ReadDeviceId" (16#01) contained in the request is incorrect.

16#02 = The "Object Id" (16#00) contained in the request is incorrect.

Example of positive response:

•Address = 2

•Manufacturer name = “Telemecanique”

•Device name = “ATV71HU15M3”

•Device version = “0201”

•Device name = “MACHINE 4”

Request:

Slave no.

Request code

Type of MEI

ReadDeviceld

Object Id

CRC

CRC

Lo

Hi

02

2B

0E

01

00

34

77

Response:

Slave no.

Response

Type of

ReadDeviceld

Degree of

No. of additional

Next object Id

Object no.

code

MEI

conformity

frames

02

2B

0E

01

02

00

00

04

-------

-------

-----	Id of		Length of										Value of object no. 1													-----
-----	object no.		object no. 1	’T’		’e’		’l’		’e’		’m’	’e’	’c’		’a’		’n’				’i’	’q’	’u’	’e’	-----
	1
	00		0D	54		65		6C		65		6D	65	63		61		6E			69		71	75	65
----
	Id of		Length of							Value of object no. 2												----
----	object no.	object no. 2		’A’		’T’	’V’		’7’		’1’	’H’	’U’	’1’		’5’	’M’			’3’		----
	2
	01		0B	41	54		56		37		31	48	55	31	35		4D			33
----
	Id of		Length of	Value of object no. 3
----	object no.		object no. 3	’0’		’2’	’0’		’1’
	02		04	30	32		30		31
----
	Id of		Length of					Value of object no. 4									CRC		CRC
----	object no.		object no. 4	’M’		’A’	’C’		’H’		’I’	’N’	’E’	’ ’		’4’	Lo			Hi
	4
	06		09	4D	41		43		48		49	4E	45	20	34		6F			50

33