Watlow Electric Gateway & DeviceNet - Manual (Page 11)

RUI/Gateway & DeviceNet TM
Configuration & Ladder Logic Example
Using an Allen-Bradley CompactLogix PLC
Watlow
1241 Bundy Blvd
Winona, MN 55987
Telephone: 507-494-5656
© 2007 Watlow Electric Mfg Co 11
4/08
19. The gateway instance represents the EZ-ZONE
®
control, in this case, PM 1-4. The enable
gateway instance simply turns on that particular gateway where there is a direct correlation
between gateway instance 1 and EZ-ZONE
®
PM controller 1. Likewise, that relationship
continues through gateway instance 16 and EZ-ZONE
®
PM controller 16. The gateway
instance will always equate to the Standard Bus controller with the same address 1-16.
The CIP offset allows for the PLC or any master on the DeviceNet
TM
side to read or write the
same member from any of the four controllers on the Standard Bus network via an explicit
message.
Configuring the DeviceNet TM Scanner (1769-SDN) Using RSLogix 5000
20. In the examples that follow please note that the PLC being used is a CompactLogix L32E. If
using other PLCs the steps will vary slightly but the overall concepts will be the same. As you
might guess some configuration is required on the PLC side prior to getting started with the
programming.
21. Insert a DeviceNet TM scanner into the I/O structure of the PLC. Notice below the input and
output size correlates directly to what was configured in RSNetWorx (step 15).