Mitsubishi Electric MELSEC Q Series User Manual page 176

(c) Interrupt event issuance timing
The data refresh interrupt event is issued in the timing of data refresh cycle.
For details, refer to the following.
 Page 175, Section 11.7.3
(d) When an interrupt event has already been notified at execution of the C Controller
module dedicated function (CCPU_WaitDataRefreshEvent function)
The user program is restarted from the interrupt event waiting status at the same time with the
CCPU_WaitDataRefreshEvent function execution.
If multiple interrupt events with the same interrupt event No. at the time of the CCPU_WaitDataRefreshEvent
function execution are already notified, the user program processes them as a single interrupt event
notification.
(e) When using the C Controller module dedicated function
(CCPU_WaitDataRefreshEvent function) in multiple user programs
Do not enter the same interrupt event number by multiple user programs.
Doing so result in the uncertain situation of which user program to receive the interrupt event.
(f) Operations in reset
When the C Controller system is reset, the data refresh memory is all initialized to 0.
Interrupt condition check is only valid right after resetting.
Therefore, an interrupt event may be issued depending on the interrupt condition.
(g) Assurance of data refresh
Old and new data may be mixed depending on data refresh timing.
However, this does not occur in the following conditions.
• Data refresh data are 16-bit
• Data refresh data are 32-bit and the dare refreshing and data refreshed addresses are of even numbers
(h) I/O to uncontrolled module in multiple CPU system
I/O values to uncontrolled input module/output module/I/O combined module/intelligent function module may
vary from the actual I/O values.
For details of access to uncontrolled modules, refer to the following.
 QCPU User's Manual (Multiple CPU System)
(i) When the devices which do not exist are specified
For the data refresh setting, specify the existing devices. If the devices which do not exist, the data refresh and
link refresh will be stop.
174
For "-LS", consult with the
partner (operating system vendor).
For "-LS", consult with the
partner (operating system vendor).