User`s manual

Watlow EZ-ZONE™ Communications • 49 • Chapter 4 DeviceNet
Figure 4.14
Configure and Program an Allen-Bradley CompactLogix L32E
Now that the DeviceNet scanner module has been configured lets take a closer look at the configuration
in the PLC. After adding the DeviceNet scanner module to the PLC I/O structure notice the input and output
size required to read and write to the the PM default assembly structure. If you do not have a need to work
with the entire assembly structure than the I/O sizes can be decreased accordingly.
Because the Logix family of controls allows the user to create user defined data types it is suggested that
you do so for ease of programming. An example of two user defined data types were created to represent the
default O to T and T to O assembly structures. Notice that a couple of members identified in the T to O struc-
ture are identified as "Not Used". They are identified as such for two reasons:
1. When the PM PID control is equipped with the DeviceNet card analog input 2 is not an available option.
2. When the PM PID control is equipped with the DeviceNet card the integrated limit is not an available op
tion.
Keep in mind that these particular members (and all members for that matter) can be modified according
to your liking following the step-by-step procedure beginning under the section entitled "Ladder Logic Ex-
ample"..
Figure 4.15