Omron E5ZN-DRT, Operation Manual

Page: 59 / 162

44
Allocating I/O from the Configurator Section 4-3
2. When using a CS/CJ-series DeviceNet Unit as the master, the location and
size of the DeviceNet Area can be specified through the allocated DM Area
words, without using the Configurator. For slaves, however, I/O is allocated
in the DeviceNet Area in node-address order. For details, refer to the
CS/CJ-series DeviceNet Unit Operation Manual (W380).
4-3 Allocating I/O from the Configurator
4-3-1 Setting Allocation Data
Use the Configurator to allocate data other than the process values and set
points (such as PID constants), or to allocate only that data that is required.
Turn OFF pin 1 of the DIP switch on the rear of the DeviceNet Communica-
tions Unit to enable I/O to be allocated from the Configurator.
Create the allocation data by selecting any data from the list of parameters
using the Configurator. Download the allocation data that has been edited
using the Configurator to the DeviceNet Communications Unit.
Any allocation size can be set within the following range according to the num-
ber of allocation parameters that have been selected.
• IN Area: 0 to 100 words
• OUT Area: 0 to 100 words
Note If too many allocation data parameters are selected, the area available for
other slaves may not be sufficient, or the Network may become overloaded.
Therefore, restrict the data to those parameters that require relatively frequent
reading or writing, and use explicit messages to read and write other data.
4-3-2 Creating Allocation Data
Allocation data is specified using the Configurator and then downloaded to the
DeviceNet Communications Unit. Any data can be selected from the list of
parameters, and then allocated freely in the IN Area (up to 100 words) and
OUT Area (up to 100 words).