Mitsubishi Electric MELSEC iQ-R Series User Manual page 12

Considerations for other functions
■Access target CPU setting
• When rewriting the settings in Configuration Tool, turning the power OFF and ON, or resetting a CPU module, a high speed
data communication module is prepared to communicate with an access target CPU module. Therefore, if a large number
of access target CPU modules are set, several minutes are required for this preparation.
• The following conditions may affect the general sampling: a CPU module that does not exist is set as an access target CPU
module, or a high speed data communication module cannot communicate with the access target CPU module temporarily
because of the power interruption of access target CPU module or network failure. Before using a high speed data
communication module, make sure that the module can communicate with a CPU module set as an access target CPU.
■Time synchronization function
• If implementing the time synchronization with a CPU module, it will change the time in a high speed data communication
module. If the time in a CPU module is changed, the time in a high speed data communication module may be greatly
changed.
• Since there is inaccuracy in the clock element of a CPU module and high speed data communication module, the time may
be moved slightly forward or backward when the time is synchronized. Changing the time in the high speed data
communication module affects the time information of transfer data and the time stamps of error/event history and access
history; therefore, configure the module to synchronize its time at the minimum requirements.
Considerations for accessing a high speed data communication module
■Web browser operations and settings
• In the local area network (LAN) setting of the web browser, do not set a proxy server for the local address. (Page 38
Online startup)
■Replacement of an older version of a module
• When replacing an older version of a high speed data communication module, delete temporary internet files (caches) of a
web browser before accessing a newer version of the module.
■Number of connections
• Up to five connections
sixth or later host computer/Configuration Tool, disconnect any active connection.
*1 If all the connections are from host computers, the maximum number of simultaneous connections will be four.
■Connection with Configuration Tool
• Note that a module may be in an unintended status when operating it in multiple pieces of Configuration Tool at the same
time.
Considerations for security
• Although a high speed data communication module supports basic authentication (account setting) using a user name and
password, it does not completely protect the system from illegal access. Avoid an account (user name, password)
consisting of simple alphanumeric characters only, and include some non-alphanumeric characters ($, &, ?) to create a
complicated user name and password.
Considerations for using an SD memory card
■SD memory card file/directory
• Do not create a file or folder on an SD memory card with a personal computer. If a file or folder is created on an SD memory
card with a personal computer, they may be deleted.
■SD memory card to be used
• Use an SD memory card manufactured by Mitsubishi Electric Corporation described in the following section. If any other
SD memory card is used, data in the SD memory card may be corrupted while the system is running or the system may
stop (a module major error (error code: 2450H) occurs in a CPU module).
(Page 57 Connection System Equipment)
10
*1
can be established simultaneously for one high speed data communication module. To connect the