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Explicit messages with RS Logix 5000

Click on blue ? and choose the MESSAGE1 tag

from the list.

Click on box next to MESSAGE1 to configure the read command.

Set the Message Configuration to the following:

Service code: E Hex

Object type: 69 Hex

Object ID: 1

Object Attribute: 76

Set Source and Destination to VLT_READOUT tag and the number of elements to 1.

Now the message is set up to read par. 518 Data read-out: Frequency

MN.51.T1.02 - VLT is a registered Danfoss trademark

VLT

5000 DeviceNet and Allen Bradley Control logix 5550

This is a read command GET_ ATTRIBUTE _SINGLE

This is the Class ID. 69 Hex means par. Group 500. See page 15.

This is the Instance. Always 1 in VLT 5000.

This is the attribute. 76 Hex (118 dec) is par. 518. See page 15.