Yaskawa FSP Amplifier FlexWorks - Manual (Page 93)

Operating the FSP Amplifier Using FlexWorks
93
Interrupt_reg:
Because only bit 3 is set to 1 in the Interrupt_mask variable, only
interrupt 3 will be handled; interrupts 4 and 1 will be ignored. Only
bit 3 in Interrupt_pending will be set to 1, as it is the only bit set to
1 in both Interrupt_request and Interrupt_mask:
B IT
# 7 6 5 4 3 2 1 0
Setting 0 0 0 0 1 0 0 0
Variable value: Interrupt_pending = 8
4.11.7. Interrupt Commands
Commands are used to signal the beginning and the end of each
interrupt service routine. The commands INT and EXT_INT signal
the beginning of interrupt service routines, and specify the internal
or external interrupt conditions respectively. The command
INT_RETURN signals the end of the interrupt service routine, and
specifies the program line to which to return.
4.11.7.1. EXT_INT
Format: EXT_INT
This command indicates the beginning of an interrupt service
routine, when the interrupt is conditional on the value of an
external input. The argument specifies the interrupt
priority. is specified as a value from 0 to 7, where 0 is
the highest priority and 7 is the lowest. specifies
the number of the digital input to be monitored. specifies
whether the interrupt is to be triggered when the value of the
digital input changes from 0 to 1 (Rising), from 1 to 0 (Falling), or
whenever it changes (Both).
Figure 53: Programming an EXT_INT Command