Mitsubishi MELSEC-Q Series User Manual page 10

Precautions for tag function
Precautions for logging function
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(2) Remote password function of QCPU
The remote password function of the QCPU is not used for the Web server
module.
When restricting access to the QCPU, use the user authentication function of the
Web server module.
(1) Tag setting and component setting (Refer to Section 6.3.3)
(a) When a component setting is deleted, the settings of the components after
the deleted setting No. are shifted up.
When the component has been set in the user part of the user screen creation
function, reexamine the parameters since the setting No. is changed. (Refer to
Chapter 7 for user part details.)
(b) If a component has a wrong device number in the component setting, the
other component that will obtain the device of the same access target CPU
will result in an error. Check the device number set in the component setting.
(c) If the data type is set as "String" in the component setting, device values
may be replaced.
(2) Tag sampled at high speed
(a) Be sure to create a user-set system area in the program memory of the
control CPU. (Refer to Section 6.3.3 REMARKS.)
(b) "Sampling: High speed" can be registered to only one tag. (Multiple setting is
not allowed)
(c) The access target CPU of the tag component selected to execute "Sampling:
High speed" is the access target CPU setting No. 1 (control CPU). (Fixed)
(d) Total points of 96 or less can be set for the devices of the tag component
selected to execute "Sampling: High speed".
(1) Logging setting (Refer to Section 6.4.4)
(a) When the logging file storage has been set to the standard ROM, pay
attention to the free user area of the standard ROM or the number of writes
to standard ROM.
(b) E-mail transmission/File transfer requires several to several tens of seconds
depending on the network line and data size.
Depending on the logging setting, the target file may be deleted before e-mail
transmission or file transfer is completed.
Examine the settings, such as the timing, file capacity and number of saved
files to increase the time to file deletion.
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