Watlow Electric Gateway & DeviceNet manual Using an Allen-Bradley CompactLogix PLC

RUI/Gateway & DeviceNetTM

Configuration & Ladder Logic Example

Using an Allen-Bradley CompactLogix PLC

15.Once the available device (RUI/Gateway in this case) is moved over to the Scanlist the next step will be to map the RUI/Gateway input and output bytes to PLC addresses; first the inputs. In this particular case the Automap on Add box was checked and the result of that now becomes apparent. Since there were no other devices on the network the software simply took all of the available RUI/Gateway input bytes (84) and allocated them to the first available PLC input bytes. Although we can’t see in the graphic below all of the addresses assigned you can trust that what was assigned are addresses 1:I.Data[0] through 1:I.Data[20]. If there were other devices on the network and the Automap on Add box was not checked the address field below would not be populated. Clicking on the Advanced button would then allow for manual configuration.

16.Likewise, all of what was said above regarding the inputs also applies to the outputs as well. Notice in the graphic below that for the outputs the size changes to 80 bytes or 20-32 bit words and addresses given would be 1:O.Data[0] through 1:O.Data[19]. Click on the OK

button where you will then be prompted to write this configuration to the scanner memory.

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