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APPENDICES
A
Appendix 7 Differences from Ethernet Modules of Other Series
Appendix 7.3 Differences from QnA/A series modules
The response performance of the E71 to connected devices is faster than that of the A/QnA series modules. When the E71
is used, the compatibility with the A/QnA series modules cannot be precisely maintained. If there is a problem due to the
performance of the connected device, create a timing similar to that of the existing system using the CPU module constant
scan setting.
(2) Precautions for using the same program
The QnA/A series modules used for data communications between a CPU module and the connected device on
the Ethernet network can be replaced by an E71. This section describes precautions for using the same program
used in QnA/A series modules.
(a) AJ71E71(-S3) and AJ71E71N
• Program of connected devices
The following communication function programs of connected devices for an AJ71E71(-S3) and
AJ71E71N can be used for communications with an E71. However, because the response speed of the
AJ71E71(-S3) and AJ71E71N is different from that of the E71, the program may not be used as is. Before
using the same program, check the operation.
: Communications allowed by using the program for an AJ71E71(-S3) and AJ71E71N on the connected device side, -: Not allowed to use
*1 Only A-compatible 1E frame commands can be used for data communications. To perform data communications using a
command other than the A-compatible 1E frame commands, create a new program.
• Program for an AJ71E71(-S3) and AJ71E71N in the own station
Because the assignment of the buffer memory areas for an E71 is different from that for an AJ71E71(-S3)
and AJ71E71N, a program for the AJ71E71(-S3) and AJ71E71N cannot be used for an E71. Create a new
program by referring to chapters that explain each function.
• Program using an I/O signal
Programs cannot be used together with parameter settings on the programming tool.
Function
Connected
device
E71
E71
connected
device
AJ71E71(-S3),
AJ71E71NE71
E71AJ71E71(-S3),
AJ71E71N
Communications using a fixed buffer
("Procedure Exist")
Communications using a random
access buffer
Data read/write in the CPU module
*1
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