ADLINK PCI-8134A - Manual (Page 56)

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• Operations
•
In Case 1, the axis will be stopped immediately when axis detected the
edge of ORG signal but it might stop at anywhere within the range of
ORG signal that means the home position is inaccurate after home move
was executed many times.
•
The feedback counter of PCI-8134 will be reset to zero while the motion
is hitting the edge of ORG signal.
•
As Do Not Latch mode, the axis will start searching EZ signal after the
ORG signal was detected within 5 clock periods.
•
In Case 2-2 & 3, the axis will hit and then stop at the edge of EL signal
anyway because the edge of EZ signal locates behind the start point of
Home Move that the axis won’t detect the edge of EZ signal anymore.
•
In Case 2-1, if there are two or more EZ signals in the system, the axis
will search next EZ signal because the ORG signal was turned ON
continuously.
•
After normal home finished like case 1, users have to copy to position
value to command counter and target position counter at the same time.
Counter status after Home Move Completed (Motion Done)
Set_cnt_src()=0 (internal) set_cnt_src ()=1 (external) Interrupt?
Get_command() get_position() get_command() get_position()
Case 1 Doesn’t change Remain 0 Doesn’t change Stop at a deceleration
position Home Int
Case 2-1 Doesn’t change Remain 0 Doesn’t change Stop at a deceleration
position Home Int
Case 2-2 Doesn’t change Stop at a EL
position Doesn’t change Stop at a EL position EL Int
Case 3 Doesn’t change Stop at a EL
position Doesn’t change Stop at a EL position EL Int