Precautions For Cw Workbench Connection - Mitsubishi Electric MELSEC Q Series User Manual

19.4.3

Precautions for CW Workbench connection

(1) Errors in program download
When a user program is specified and downloaded to the target (C Controller module) from CW Workbench, a
system error or stop (such as a system watchdog timer error) may occur in the
C Controller module during downloading if the program is too large. When a system error or stop (such as a
system watchdog timer error) has occurred, take either of the following measures.
• Increase the value of "WDT (watchdog timer) setting" on the System settings tab of Setting/monitoring tools
for the C Controller module.
• Load the program in the C Controller module before debugging.
(2) Interrupt processing delay
During remote debugging by CW Workbench, interrupt of the C Controller module may be prohibited. Meantime,
processing called from an interrupt routine (example: C Controller module dedicated function for ISR) is not
executed.
Interrupts that are expected to occur at fixed intervals, such as a cyclic timer interrupt, may delay.
(3) When restarting the C Controller module
If the destination C Controller module is restarted with CW Workbench connected ("Connect"), Workbench
automatically connects ("Connect") after startup of the C Controller module. At that time, system task(s) operating
in the C Controller module is temporarily blocked, so an error may occur. To restart the destination C Controller
module, ensure that CW Workbench is disconnected ("Disconnect") in advance.
(4) Message displayed on Host Shell
Message(s) issued by VxWorks during Host Shell connection may be displayed.
For messages of VxWorks, refer to manuals for VxWorks, Workbench, or Help of CW Workbench.
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