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MELSEC-Q
5 BASIC USAGE
3) Intelli. module side "Start I/O No."
Set the start I/O number of the QD62(E/D).
Setting range: 0000 to 0FF0 (H)
4) Intelli. module side "Start SI No."
Set the start interrupt factor (SI) No. of the QD62(E/D).
Setting range: 0 to 3
The following example shows SI 0 to 3 of the QD62(E/D) installed in the slot
where the start I/O is 20 being assigned to interrupt pointers I50 to I53.
(c) The following two methods are available for using only specific SI numbers:
1) Method using the parameter interrupt pointer setting
The interruption factors are used only for the start SI number and the
additional number of pointers, only which are specified in the "Intelligent
function module interrupt point setting" window. For example, if the start
SI number is set as 1 and the number of pointers is set as 2, only SI 1
and 2 are used. Also, the interrupt function cannot be used when the
parameter interrupt pointer setting has not been set.
2) Method using the IMASK instruction from the sequence program
When the IMASK instruction is used, interrupt program execution
enable/disable (interrupt mask) can be set for each interrupt pointer
number.
For details on the IMASK instruction, refer to the MELSEC-Q/L
Programming Manual (Common Instruction).
POINT
A coincidence detection interrupt occurs when the counter value coincidence signal
rises (off to on). Thus, the next interrupt request does not occur unless the
coincidence signal is reset and the counter value coincidence signal is turned OFF.