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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.
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
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
Installation and connection
For the Altivar 61, keep the existing connections.
1. 6. 3. Communication with DeviceNet bus (VW3A58309)
Card catalog number
Installation and connection
For the Altivar 61, keep the existing connections.
1. 6. 4. Communication via Modbus Plus bus (VW3A58302)
Card catalog number
Installation and connection
For the Altivar 61, keep the existing connections.
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
ATV38 ATV 61
VW3A58303 VW3 A3 303
ATV38 ATV 61
VW3A58307 VW3 A3 307
ATV38 ATV 61
VW3A58309 VW3 A3 309
ATV38 ATV 61
VW3A58302 VW3 A3 302