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Loop Control Unit Precautions
Section 3-3
3-3
Loop Control Unit Precautions
3-3-1
System Information Area Settings
When monitoring a Loop Control Unit with Monitor Plus, the “system informa-
tion area” is used to display and set the system information. To use the sys-
tem information area, the following data must be set in the System Common
block (Block Model 000) in the Loop Control Unit.
Default Settings to the System Common block (Block Model 000)
System Information
System information is information such as the Loop Control Unit’s unit
address and operating information. When the Loop Control Unit starts, this
information is written to the 24 words (8 words per Loop Control Unit) starting
with the leading address the data memory for node Terminals.
Note
1.
The default leading address of the data memory for node Terminals is
D16020 and the default LCU number is 0. Accordingly, the default location
for the system information is the eight words from D16020 to D16027 when
the Loop Control Unit is started. If the Loop Control Unit is being used with
its default settings, do not use words D16020 to D16027 for any other ap-
plications.
2.
When two or three Loop Control Units are mounted in the same CPU Rack,
set a unique LCU number (ITEM042) in each Loop Control Unit to distin-
guish the Units. In addition, set the same leading address of the data mem-
ory for node Terminals (ITEM043) in each Loop Control Units.
3-3-2
Applicable Versions
The Send All Blocks (Block Model 461) and Receive All Blocks (Block Model
462) are not supported by Loop Control Units prior to version 2.0. CX-Process
Monitor Plus thus cannot be used with Loop Control Units prior to version 2.0.
ITEM
Function
Setting range
Default
043
Leading address (S) of the data memory
for node Terminals
0 to 32767
16020
042
LCU number
A unique LCU number identifies each Loop
Control Unit when there are multiple Loop
Control Units (3 Units max.) mounted in the
CPU Rack.
0 to 2
0
Loop Control Unit
LCU number 2
System
Information
(8 words)
System
Information
(8 words)
System
Information
(8 words)
Loop Control Unit
LCU number 1
Loop Control Unit
LCU number 0
CPU Unit
DM Area
Leading address
of data memory
for node Terminals
8 words
8 words
8 words
Summary of Contents for CX-Process Monitor Plus 2
Page 1: ...CX Process Monitor Plus Ver 2 Cat No W428 E1 02 SYSMAC WS02 LCMC1 EV2 OPERATION MANUAL...
Page 2: ...WS02 LCMC1 EV2 CX Process Monitor Plus Ver 2 Operation Manual Revised January 2007...
Page 3: ...iv...
Page 5: ...vi...
Page 9: ...x...
Page 15: ...xvi Application Precautions 4...
Page 41: ...26 Basic Operating Procedure Section 1 2...
Page 243: ...228 Checking Configurations Section 5 7...
Page 267: ...252 Reading Writing Function Block ITEMs Appendix A...
Page 269: ...254 Differences between Trend Screens and Batch Trend Screens Appendix B...