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DM Area Allocations
Section 4-3
4-3
DM Area Allocations
4-3-1
Overview of the Allocated DM Area Words
The various kinds of data are stored in the offset positions shown in the fol-
lowing diagram, from the beginning word in the area for each Unit.
The beginning word m is calculated by the following equation:
Beginning word m = (100 x unit number)
4-3-2
Details of the Allocated DM Area Words
IP Address Display/Setting Area (m+98 and m+99)
IP address: (1)(2).(3)(4).(5)(6).(7)(8) (Hex)
If the local IP address is set to a value other than 0.0.0.0 in the TCP/IP Config-
uration, this area (words m+98 and m+99) will act as an IP Address Display
Area and the local IP address set in the TCP/IP Configuration will be read and
stored here when the power is turned ON or the Unit restarted.
If the local IP address in the TCP/IP Configuration is set to 0.0.0.0, this value
is read by the EtherNet/IP Unit when the power is turned ON or the Unit
restarted and is used as the local IP address.
If the local IP address in these words and the TCP/IP Configuration are both
set to 0.0.0.0, the default IP address (192.168.250.Node_address) will be
used. For details on the IP address settings, refer to SECTION 5 Determining
IP Addresses.
Note
(1) If an IP address other than 00.00.00.00 is set as the local IP address in
the TCP/IP Configuration, the IP Address Display/Setting Area words
(m+98 and m+99) will be overwritten with the TCP/IP Configuration’s IP
Offset
Bit
Data direction
m
m+97
m+98
m+99
15
08 07
00
(Not used)
IP Address Display/Setting Area
Ethernet Unit to CPU Unit or
CPU Unit to Ethernet Unit
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
m+98
(1)
(2)
(3)
(4)
m+99
(5)
(6)
(7)
(8)
(1)(2).(3)(4).(5)(6).(7)(8) (Hex)
Application
Setting device
Setting area
Remarks
Simple operation (i.e., The TCP/IP
Configuration is left at its default
settings. Only the IP address is
set.)
Programming Con-
sole (CX-Program-
mer can also be
used.)
Allocated words in
the DM Area
• The setting in the allocated DM Area
words is enabled only when the IP
address is set to 0.0.0.0 in the TCP/IP
Configuration.
• If the IP address is set to a value other
than 00.00.00.00 in the TCP/IP Con-
figuration, this value is stored in the
allocated words in the DM Area.
Operation with the desired IP
address set in the TCP/IP Configu-
ration.
CX-Programmer
(Unit Setup)
Setup TCP/IP Con-
figuration Dialog Box
The IP address set in the Setup TCP/IP
Configuration Dialog Box is stored in
the allocated DM Area words.
Содержание CJ2H-CPU6 - REV 02-2010
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Страница 38: ...12 Network Configurator Overview Section 1 5...
Страница 58: ...32 Selecting the Network Devices Section 2 3...
Страница 116: ...90 Auxiliary Area Data Section 4 5...
Страница 222: ...196 Message Communications Errors Section 7 6...
Страница 364: ...338 Using the Backup Tool Section 13 3...
Страница 402: ...376 CS CJ series Ethernet Unit Function Comparison Appendix A...
Страница 404: ...378 Ethernet Network Parameters Appendix B...
Страница 406: ...380 TCP Status Transitions Appendix C...
Страница 452: ...426 Precautions for Using Windows XP Vista or Windows 7 Appendix G...
Страница 460: ...434 Index...
Страница 462: ...436 Revision History...
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