APPX
Appendix 8 When Connecting the Module to a Remote Head Module
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Appendix 8 When Connecting the Module to a
Remote Head Module
This section describes the restrictions for when connecting the RJ71EN71 to a remote head module.
Restricted functions and specifications
Function
This section describes the restricted functions of when connecting the RJ71EN71 to a remote head module.
Module parameter
There are differences between when the RJ71EN71 is connected to the CPU module and when the RJ71EN71 is connected
to the remote head module. For details, refer to the following.
MELSEC iQ-R CC-Link IE Field Network Remote Head Module User's Manual (Application)
This manual describes the restrictions specific to the RJ71EN71.
Open/close processing
Perform the open/close processing of the connection from the external device.
Function Restrictions
Communications using the SLMP • The command that can be used differs from that of the CPU module. For the command that can be
used in the remote head module, refer to the following.
SLMP Reference Manual
• The file that can be operated differs from that of the CPU module. For the file that can be operated in
the remote head module, refer to the following.
MELSEC iQ-R CC-Link IE Field Network Remote Head Module User's Manual (Application)
Communications using the predefined protocol Cannot be used.
Socket communications Cannot be used.
Communications using the fixed buffer Cannot be used.
Communications using a link dedicated instruction Although the own station can be specified as the relay station or target station, the link dedicated
instruction cannot be executed from the own station.
File transfer function (FTP server) • The file that can be operated differs from that of the CPU module. For the file that can be operated in
the remote head module, refer to the following.
MELSEC iQ-R CC-Link IE Field Network Remote Head Module User's Manual (Application)
• The number of files that can be written to the data memory differs from that of the CPU module. For
the maximum number of files that can be written to the data memory of the remote head module,
refer to the following.
MELSEC iQ-R CC-Link IE Field Network Remote Head Module User's Manual (Startup)
Time setting function (SNTP client) Cannot be used.
IP filter function When the network type is "Q Compatible Ethernet", this function cannot be used.
IP address change function When the network type is "Q Compatible Ethernet", this function cannot be used.
Redundant system function Although the RJ71EN71 can be connected to a redundant system of a remote head module, redundant
system of the RJ71EN71 cannot be configured.
Communications using MODBUS/TCP • When the network type is "Q Compatible Ethernet", this function cannot be used.
• The default values set for the MODBUS device assignment parameters cannot be used for creating a
project for the engineering tool using the remote head module. Clear the values first before starting
the setting.
Parameter name Restrictions
Basic Settings Own Node Settings Select "Do Not Open by Program" for "Opening Method".
External Device
Configuration
When performing TCP/IP communications, select "Unpassive Connection Module" or "Fullpassive
Connection Module" for the external device.
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