Mitsubishi MELSEC-Q Series User Manual page 11

Precautions for user screen creating function
Precautions for other functions
A - 9
(2) High-speed logging
(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) A delay may occur in the logging interval depending on the scan time of the
control CPU and the time of access from a peripheral device/intelligent
function module to the programmable controller CPU.
(1) User parts
(a) Be sure to set the must-be-set parameters of the user parts.
Failure to do so will result in an error.
(b) The file names and parameters of the user parts are not case sensitive.
(c) When the contents of a user screen have been changed, delete the
temporary Internet files (cache), and then read the user screen on the Web
browser.
(Refer to Section 6.2.7 (1) for how to delete the temporary Internet files.)
(d) The device value corresponding to the tag component specified in the user
parts parameter must be retained for a time longer than the tag collection
interval and communication time in the sequence program.
(Especially, be careful when accessing the user screen via the Internet.)
When the retention time of the device value is too short, value change may
not be displayed in user parts accurately.
(2) Sample screens
Sample screens for the user parts are available in the /ROM/WWW/USER/
directory of the Web server module.
Delete all sample screen files before starting actual operation. (To prevent write
to the devices using the sample screens)
The sample screens can be restored by initializing the module. (Refer to Section
4.13.)
(1) Account setting (Refer to Section 4.6.5)
After completion of initial setting, make sure to register at least one account with
administrator authority, and then connect to the network.
(2) IP filter setting (Refer to Section 4.6.6)
(a) When using a mail server, FTP server, DHCP server, DNS server and/or
router, do not block the IP packets of these devices.
To do so will disable communication with the above devices.
(b) When a proxy server exists on the LAN, block the IP address of the proxy
server. If the IP packet from the proxy server is passed, access to the Web
server module is available from a personal computer that can access the
proxy server regardless of the other setting.
(c) When accessing the Web server module from a personal computer on the
LAN, do not use the proxy server.
A - 9