ADLINK PCI-8134A - Manual (Page 66)

56
• Operations
The end-limit signals are used to stop the control output signals (OUT and
DIR) when the end-limit is active. PEL signal indicates end-limit in positive
(plus) direction. MEL signal indicates end-limit in negative (minus) direction.
When the output pulse signals (OUT and DIR) are toward positive direction,
the pulse train will be immediately stopped when the PEL signal is inserted,
while the MEL signal is meaningless in this case, and vise versa. When the
PEL is inserted and the output pulse is fully stop, only the negative (minus)
direction output pulse can be generated for moving the motor to negative
(minus) direction.
The end-limit signals can be used to generate the IRQ by setting the bit 0 of
INT. factor in software function: set_int_factor().