Rockwell Automation 8520-GUM 9/Series CNC Grinder Operation and Programming Manual Documentation Set - Manual (Page 735)

Program Interrupts and
Dressing Interrupts
Chapter 22
22-15
Consider this list when programming and executing program or dressing
interrupts:
Your system installer can determine in AMP whether an interrupt
program request is recognized when an interrupt switch is turned on, or
only when the switch makes the transition from off to on (assuming the
interrupt is already enabled). This is to prevent the accidental execution
of an interrupt program if a switch is inadvertently left on when a
program begins execution. This applies to program interrupts and
operator requested dressing interrupts
Interrupt programs can only be executed when the control is in the
automatic mode. Interrupt requests that occur during MDI or
MANUAL modes are ignored
Dresser/wheel radius compensation
- If compensation is active (G41 or G42) when an interrupt request is
made, it remains active throughout execution of the interrupt unless
canceled with a G40. Different tool radii (selected with a T word)
and different compensation directions (G41 or G42) can be
programmed in the interrupt program. However, it is the
programmer’s responsibility to make sure the correct compensation
direction (G41, or G42) is active and the correct length and radius
offset is active (as programmed with the T word) before the M99
return from interrupt command is executed.
- If compensation is not active when the interrupt request is made, it
can be activated by programming either a G41 or G42 in the interrupt
program. Compensation, however, must be turned off with a G40 in
the interrupt program before the M99 return block is executed.
Interrupts that are requested when the control is in E-STOP are ignored
regardless of whether the interrupt is enabled or not.
You can execute interrupts only when the control is in the cycle start
state. If you request for an interrupt when the control is in cycle stop or
cycle suspend, the control recognizes the interrupt request. The control
executes the interrupt program when a cycle start state becomes active
again. Dressing interrupts can only be requested when the control is not
in G80 mode (control must be reciprocating or performing a
surface/cylindrical grinding cycle).
22.4
Interrupt Request
Considerations