4
Features and System Configuration
Section 1-1
1-1-2
Overview of Unit Communications Functions
Remote I/O
Communications
DeviceNet Communications Unit data is shared with the master's IN Area and
OUT Area through DeviceNet. Up to 100 words (200 bytes) each can be used
as the IN Area and OUT Area for the DeviceNet Communications Unit. (The
first word (two bytes) of the OUT Area is always allocated for the OUT Enable
Bit).
The IN Area is allocated for data such as the communications status and the
process values of the Temperature Controller channels and the OUT Area is
allocated for the set points of the channels and other data.
When using a CS/CJ-series DeviceNet Unit as the master, the IN Area can be
divided into two areas. One is normally used for input data (such as Tempera-
ture Controller process values), and the other can be used for reading status
(such as Temperature Controller status). Even when the IN Area is divided
into two areas, however, the total number of words that can be used for the IN
Area is still 100 words (200 bytes).
DeviceNet Communications Unit
DeviceNet
PLC
CPU Unit
Output Enable Bit
Read parameter setting
Write parameter setting
Unit 0, ch 1 PV
Unit 0, ch 2 PV
Unit 1, ch 1 PV
Input Area
Unit 0 Unit 1
Temperature Controllers
Remote I/O communications
output area
Remote I/O
communications
DeviceNet Communications Unit
Unit 0, ch 1 SP
Unit 0, ch 2 SP
Unit 1, ch 1 SP
Output Completed Flags
Read parameter monitor
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...