45
Allocating I/O from the Configurator
Section 4-3
Note
Fixed allocations cannot be used if 11 or more TC4 Units are used.
Use user-set allocations.
User-set Allocations
With user-set allocations, the Configurator can be used to allocate I/O to the
DeviceNet Communications Unit in any location of the CPU Unit's I/O memory
area.
The configuration of the DeviceNet Communications Unit's allocation data is
fixed, so the data can be used by merely allocating it in the master. For actual
allocating methods, refer to
4-5 Allocating Data in the Master
.
Note
1.
When performing user-set allocations from a DeviceNet Configurator, use
Ver. 2.44 or higher. When using the CX-Integrator, use Ver. 2.2 or higher.
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
(Cat. No. 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 of the DeviceNet Communications 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).
Summary of Contents for EJ1 - 07-2008
Page 3: ...iv...
Page 19: ...xx...
Page 33: ...14 Initial Temperature Controller Settings Section 1 4...
Page 53: ...34 Wiring the Temperature Controllers Section 3 4...
Page 101: ...82 Ladder Programming Examples Section 4 6...
Page 143: ...124 Sending Explicit Messages Section 6 5...
Page 155: ...136 Message Communications Characteristics Section 7 2...
Page 163: ...144 Maintenance Section 8 2...
Page 189: ...170 Allocation Numbers for Configurators Manufactured by Other Companies Appendix B...
Page 197: ...178 Index...