Delta Tau Turbo PMAC PCI-Lite, Справочник по аппаратуре

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Turbo PMAC PCI Lite
Machine Connections 15
Control-Panel Port I/O (JPAN Port)
The J2 (JPAN) connector is a 26-pin connector with dedicated control inputs, dedicated indicator outputs,
a quadrature encoder input, and an analog input. The control inputs are low-true with internal pull-up
resistors. They have predefined functions unless the control-panel-disable I-variable (I2) has been set to
1. If this is the case, they may be used as general-purpose inputs by assigning M-variable to their
corresponding memory-map locations (bits of Y address $78800).
Command Inputs
JOG-/, JOG+/, PREJ/ (return to pre-jog position), and HOME/ affect the motor selected by the FDPn/
lines (see below). The ones that affect a coordinate system are STRT/ (run), STEP/, STOP/ (abort), and
HOLD/ (feed hold) affect the coordinate system selected by the FDPn/ lines.
Selector Inputs
Caution :
It is not a good idea to change the selector inputs while holding one of the jog
inputs low. Releasing the jog input will then not stop the previously selected
motor. This can lead to a dangerous situation.
The four low-true BCD-coded input lines FDP0/ (LSBit), FDP1/, FDP2/, and FDP3/ (MSBit) form a low-
true BCD-coded nibble that selects the active motor and coordinate system (simultaneously). These are
usually controlled from a single 4-bit motor/coordinate-system selector switch. The motor selected with
these input lines will respond to the motor-specific inputs. It will also have its position following
function turned on (Ix06 is set to 1 automatically). The motor just de-selected has its position following
function turned off (Ix06 is set to 0 automatically).
Alternate Use
If I2 has been set to 1, the discrete inputs can be used for parallel-data servo feedback or master position.
The Acc-39 Handwheel Encoder Interface board provides 8-bit parallel counter data from a quadrature
encoder to these inputs. Refer to the Acc-39 manual and Parallel Position Feedback Conversion section
in the Setting up a Motor section for more details.
Reset Input
Input INIT/ (reset) affects the entire card. It has the same effect as cycling power or a host $$$ command.
It is hard-wired, so it retains its function even if I2 is set to 1.
Handwheel Inputs
The handwheel inputs HWCA and HWCB can be connected to the second encoder counter on PMAC
with jumpers E22 and E23. If these jumpers are on, nothing else should be connected to the Encoder 2
inputs. The signal can be interpreted either as quadrature or as pulse (HWCA) and direction (HWCB),
depending on the value of I905. I905 also controls the direction sense of this input. Make sure that the
Encoder 2 jumper E26 is set for single ended signals, connecting pins 1 and 2.
Optional Voltage to Frequency Converter
The WIPER analog input (0 to +10V on PMAC referenced to digital ground) provides an input to a
voltage-to-frequency converter (V/F) with a gain of 25 kHz/Volt, providing a range of 0-250 kHz. The
output of the V/F can be connected to the Encoder 4 counter using jumpers E72 and E73. If these
jumpers are on, nothing else should be connected to the Encoder 4 inputs. Make sure that the Encoder 4
jumper E24 is set for single-ended signals, connecting pins 1 and 2. This feature requires the ordering of
Option 15.