Mitsubishi MELSEC Q Series User Manual

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(g) Relations between Tornado, system watchdog timer and user watchdog
timer
When using Browser's Spy Chart function or Wind Power tool (e.g. WindView) in
Tornado environment, set a sufficiently long time to the system watchdog timer
and user watchdog timer.
Since using Browser's Spy Chart function or Wind Power tool (e.g. WindView)
activates tasks of high CPU utilization, a system watchdog timer error and user
watchdog timer error tend to occur.
(h) Common restrictions
Refer to Section 10.2.5 for the restrictions common to the bus interface functions
and MELSEC data link functions.
(2) Restrictions on bus interface functions
(a) Clock setting
Set the clock of the C Controller module without the QBF_WaitEvent or
QBF_WaitUnitEvent function being executed.
(b) Remote STOP/PAUSE and bus interface function execution result
When the operation status of the C Controller module is remote STOP or remote
PAUSE, the execution result of the following user program operation is a STOP/
PAUSE error.
• Output (Y) (QBF_Y_OutBitEx function, QBF_Y_OutWordEx function)
• Writing to buffer memory (QBF_ToBuf function)
The Y output and writing to buffer memory can be executed from the <<Module
monitor>> tab of the C Controller setting utility.
(c) Restrictions on bus interfaces
Refer to Section 10.2.4.
(3) Restrictions on MELSEC data link functions
Perform the open/close (mdOpen/mdClose function) processing of the
communication line only once at the beginning (task start) and end (task end) of a
program task.
Communication performance will decrease if open/close is repeated at each
communication.
Refer to Section 10.3.4 for the restrictions on the MELSEC data link functions.
(4) Login user
(a) Default account
Delete the default account (user name and password) with the loginUserDelete
function to prevent illegal access.
(b) Retention of set login user information
The set login user information is cleared and returns to the default when the C
Controller module is powered off or reset.
To hold the login user setting, describe a script file from which the login user
setting will be registered (added/deleted). ( Section 5.11)
Describe either of the following in the script file.
• Directly describe the login user operation commands (loginUserAdd and/or
loginUserDelete functions)
• Describe the procedure for starting the user program task for login user
operation.

Mitsubishi MELSEC Q Series Specifications

General

Brand	Mitsubishi
Model	MELSEC Q Series
Category	Controller
Language	English