Schneider Electric ATV61 manual Selecting communication channels, Communication via Modbus network

1. Determining catalog numbers

1. 6. Selecting communication channels

1. 6. 1. Communication via Modbus network

With this type of communication, there are several possible scenarios:

1)The Altivar 38 was connected via the connector port using the RS485 connection kit (VW3A58306): The connection cable should be replaced because the ATV61 has an RJ45 type Modbus port, but the port on the ATV38 is a 9-way SUB-D.

ATV38 connected to	Catalog number		Description
TSXSCA50 junction box or other screw terminals	VW3 A8	306 D30	Length 3 m, an RJ45 connector at one end and stripped at the
			other
TSXSCA62 subscriber socket	VW3 A8	306	Length 3 m, an RJ45 connector at one end and a 15-way
			SUB-D connector at the other

The integrated Modbus port does not have any pulldown resistors, but depending on the type of subscriber and the master module present on the bus, it may be necessary to match these pulldown resistors (see page 39).

2) The Altivar 38 was connected via the VW3A58303 card to a Unitelway or 4-wire Modbus RTU/Jbus/ASCII network.

The Altivar 61’s integrated Modbus port does not support these network services and it is, therefore, necessary to use an option card.

Card catalog number

ATV38

VW3A58303

ATV 61

VW3 A3 303

In this example, keep the existing connections.

If the VW3A58303 card was used with the 2-wire Modbus RTU protocol, connection on the Altivar 61’s RJ45 port is possible, as this is compatible with the presence of the graphic display terminal. Only the diagnostic service (08) is restricted to subcodes 00, 0A, 0C, 0E. Use the connection method described in Point 1.

1. 6. 2. Communication with Profibus bus (VW3A58307)

Card catalog number

ATV38

VW3A58307

ATV 61 VW3 A3 307

Installation and connection

For the Altivar 61, keep the existing connections.

1. 6. 3. Communication with DeviceNet bus (VW3A58309)

Card catalog number

ATV38

VW3A58309

ATV 61

VW3 A3 309

Installation and connection

For the Altivar 61, keep the existing connections.

1. 6. 4. Communication via Modbus Plus bus (VW3A58302)

Card catalog number

ATV38

VW3A58302

ATV 61 VW3 A3 302

Installation and connection

For the Altivar 61, keep the existing connections.

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