PMAC-PCI Hardware Reference
PMAC-PCI E-Point Jumper Descriptions 17
E22 - E23: Control Panel Handwheel Enable
E Point and
Physical Layout
Jump pin 1 to 2 to obtain handwheel encoder
signal from front panel at J2-16 for CHB2
(ENC2-B).
Jump pin 1 to 2 to obtain handwheel encoder
signal from front panel at J2-22 for CHA2
(ENC2-A).
Note: With these jumpers ON, no encoder should be wired into ENC2 on JMACH1. Jumper E26 must
connect pins 1-2, because these are single-ended inputs. This function is unrelated to the encoder brought
in through Acc-39 on J2.
E28: Following Error/Watchdog Timer Signal Control
E Point and
Physical
Layout
Jump pin 1 to 2 to allow warning following
error (Ix12) for the selected coordinate system
to control FEFCO/ on J8-57.
Jump pin 2 to 3 to cause Watchdog timer
output to control FEFCO/.
Low TRUE output in either case.
E29 - E33: Phase Clock Frequency Control
Jumpers E29 through E33 control the speed of the phase clock, and, indirectly, the servo clock, which is
divided down from the phase clock (see E3 - E6). No more than 1 of these 5 jumpers may be on at a time.
Default and
Physical
Layout
E98 Connects
Pins 1 and 2
E98 Connects
Pins 2 And 3
Note: If E40-E43 are not all ON, the phase clock is received from an external source through the J4 serial-
port connector, and the settings of E29 – E33 are not relevant.
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