Output Signal Of "Interrupt Job In Execution; Automatic Interruption Disabled Status; Job Call Stack; If An Interrupt Job Cannot Be Executed - YASKAWA YRC1000 Instructions Manual

4 Execution of an Interrupt Job
4.5

Output Signal of "Interrupt Job in Execution"

4.5 Output Signal of "Interrupt Job in Execution"
During execution of an interrupt job, the output signal turns ON to indicate
that the interrupt job is being executed. This output signal turns ON when
an interruption signal is received and the interrupt job is called, and turns
OFF when the interrupt job completes.
The output signal "Interrupt Job in Execution" turns OFF in the following
cases:
• The execution of an interrupt job completes and the suspended job is
restarted.
• Another job is called.
• The CLEAR STACK instruction is executed.
4.6

Automatic Interruption Disabled Status

Only execution of the EI instruction enables interruptions. Even after the
main power supply turns OFF, the interruption enabled/disabled status is
kept.
However, when a job is called, all interruption levels are automatically
disabled for security.
4.7

Job Call Stack

Job calls made by interruptions are processed like other job calls. The
same job call stack is used for both kinds of job calls.
Therefore, adding an interrupt job to a job call stack filled to level 8 causes
the stack to overflow.
4.8

If an interrupt job cannot be executed

An interrupt job cannot be executed in any of the following cases:
• During 1 step-back operation caused by the dedicated input
#40090-#40097 " 1 step-back operation command"
• During return operation of a restart function for arcing application
If an interrupt job is attempted, "AL4525: Specified job not executable" is
displayed.
4-2
HW1483372
HW1483372
20/27