Watlow Electric Gateway & DeviceNet Kurzanleitung

RUI/Gateway & DeviceNetTM

Configuration & Ladder Logic Example

Using an Allen-Bradley CompactLogix PLC

Watlow

1241 Bundy Blvd

Winona, MN 55987

Telephone: 507-494-5656

Configuring the RUI/Gateway on DeviceNetTM Using RSNetWorx

1. Prior to making the physical connections on the network setup the gateway DeviceNetTM

communications parameters per your network requirements, i.e., baud rate and node

address. If your not sure how to do this go to http://www.watlow.com and download the EZ-

ZONE®PM Communications Manual and follow the procedure defined in the DeviceNetTM

chapter.

2. Once the gateway communications parameters for DeviceNetTM are set according to your

network requirements connect the gateway into the network and do the following:

a. Run RSLinx software and configure the driver of choice

b. Run RSNetWorx software.

3. As shown below (within RSNetWorx software), click on the online command from the tools

toolbar and then select the appropriate communications path to browse the DeviceNetTM

network. Set up in previous step using RSLinx software.

4. After successfully browsing the network all nodes on the network will appear in the graphical

RUI/Gateway & DeviceNetTM

Configuration & Ladder Logic Example

Using an Allen-Bradley CompactLogix PLC

Watlow

1241 Bundy Blvd

Winona, MN 55987

Telephone: 507-494-5656

display as shown below. In this particular case, node 7 (RUI/Gateway) appears with a

question mark because it has not yet been registered on the network.

5. To register any given node on the network click on Tools and then EDS Wizard.

RUI/Gateway & DeviceNetTM

Configuration & Ladder Logic Example

Using an Allen-Bradley CompactLogix PLC

Watlow

1241 Bundy Blvd

Winona, MN 55987

Telephone: 507-494-5656

6. Select Register an EDS file.

7. Register a single file and then click browse to locate its location.

RUI/Gateway & DeviceNetTM

Configuration & Ladder Logic Example

Using an Allen-Bradley CompactLogix PLC

Watlow

1241 Bundy Blvd

Winona, MN 55987

Telephone: 507-494-5656

8. When found notice that if there is an icon with the same name the software will register it

along with the EDS file. Click next to proceed with the registration.

9. The next step verifies that there are no errors in the EDS file; a green check should be

displayed next to the file as shown below.

RUI/Gateway & DeviceNetTM

Configuration & Ladder Logic Example

Using an Allen-Bradley CompactLogix PLC

Watlow

1241 Bundy Blvd

Winona, MN 55987

Telephone: 507-494-5656

10. After clicking next above, the software will associate an icon to this device, if there was none

found in the previous step it will use a default icon to graphically represent this node. Click

next to proceed.

11. Clicking next above completes the registration process where the question mark is removed

and replaced with the icon of choice for node 7 (Watlow RUI/Gateway).

RUI/Gateway & DeviceNetTM

Configuration & Ladder Logic Example

Using an Allen-Bradley CompactLogix PLC

Watlow

1241 Bundy Blvd

Winona, MN 55987

Telephone: 507-494-5656

12. The next series of steps involves mapping the available RUI/Gateway input (84) and output

(80) bytes via the scanner into the PLC memory. Double click on the scanner module to

proceed.

13. Click on the scanlist tab where the next dialogue will suggest an upload or a download. Click

on the upload button to allow the scanner to see what is available on the network.

RUI/Gateway & DeviceNetTM

Configuration & Ladder Logic Example

Using an Allen-Bradley CompactLogix PLC

Watlow

1241 Bundy Blvd

Winona, MN 55987

Telephone: 507-494-5656

14. After the scanner recognizes the RUI/Gateway on the network it will then appear as an

Available Device as shown below. Before clicking on the right arrow to add it in the scanners

scan list consider the effect of the Automap on Add check box. If this box is checked and

there are other currently existing nodes on the network where they may not be using

complete words (less than 32 bits) the scanner will not consider word boundaries when

adding a new node and will attempt to utilize every available bit in the PLC. As an example, if

a given device has only 9 bytes of information it will use 2¼ 32 bit words (3 bytes not used in

the last word). Now, when adding a new node like the RU/Gateway that utilizes 80 bytes (20-

32 bit words with each being a separate entity, i.e., 32 bit Set Point) ¾ of the first word will be

placed in the last word of the node mentioned above. The impact of this action would then

break up all of the 20 words sent to and received from the RUI/Gateway in a convoluted way.

For this reason, it is suggested that this box be unchecked (if there are other devices on the

network) allowing the individual doing the configuration to select the appropriate word

boundaries manually.

In this case, there are no other devices on the network so leaving the Automap on Add box

checked will not have a negative impact on the gateway configuration.

RUI/Gateway & DeviceNetTM

Configuration & Ladder Logic Example

Using an Allen-Bradley CompactLogix PLC

Watlow

1241 Bundy Blvd

Winona, MN 55987

Telephone: 507-494-5656

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.

RUI/Gateway & DeviceNetTM

Configuration & Ladder Logic Example

Using an Allen-Bradley CompactLogix PLC

Watlow

1241 Bundy Blvd

Winona, MN 55987

Telephone: 507-494-5656

The PLC will need to be in the program or remote program mode for this to occur. When

written this completes the configuration of the RUI/Gateway using RSNetWorx.

Configuration of the RUI/Gateway

17. Prior to looking at the PLC side of things let’s first take a look at a possible network

configuration. The graphic below depicts a network consisting of an RUI/ Gateway with a PLC

on one side talking DeviceNetTM where on the other side of the gateway we see four EZ-

ZONE®PM controls talking Standard Bus. Now, seeing the network layout, the next step is to

configure the RUI/Gateway.

RUI/Gateway & DeviceNetTM

Configuration & Ladder Logic Example

Using an Allen-Bradley CompactLogix PLC

Watlow

1241 Bundy Blvd

Winona, MN 55987

Telephone: 507-494-5656

18. The table below does not represent all of the RUI/Gateway prompts that need configuration

but they do represent those that are pertinent to this discussion. (For further information on

the RUI/Gateway configuration go to the Watlow website and download the RUI/Gateway

User Manual)

Gateway

Instance

Enable

Gateway

Instance

CIP

Offset

Gtw = 1 Du;en = Yes ost = 0

Gtw = 2 Du;en = Yes ost = 4

Gtw = 3 Du;en = Yes ost = 8

Gtw = 4 Du;en = Yes ost = 12

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