Delta Tau Universal PMAC Lite, Справочник по аппаратуре

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Universal PMAC Lite
Machine Connections 39
Control-Panel Port I/O (JPAN Port)
The J2 or 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 $FFC0). There are five dedicated low-true
outputs on the JPAN connector, usually used to light LEDs. They are BRLD/ (buffer-request LED),
IPLD/ (in-position LED), EROR/ (Error condition LED), F1LD/ (1st -- warning -- following error LED),
and F2LD/ (which goes true when the watchdog timer trips). If I2=0, they refer to the panel-selected
coordinate system (by FDPn/). If I2=1, they refer to the host-selected coordinate system (&n). If I2=0 but
no coordinate system is selected (all FPDn/ inputs are floating or pulled high), these lines can be used as
general-purpose outputs, addressed as bits 20-23 of Y:$FFC2.
Thumbwheel Multiplexer Port (JTHW Port)
The Thumbwheel Multiplexer Port, or Multiplexer Port, on the JTHW (J3) connector has eight input lines
and eight output lines. The output lines can be used to multiplex large numbers of inputs and outputs on
the port, and Delta Tau provides accessory boards and software structures (special M-variable definitions)
to capitalize on this feature. Up to 32 of the multiplexed I/O boards may be daisy-chained on the port in
any combination.
The Acc-18 Thumbwheel Multiplexer board provides up to 16 BCD thumbwheel digits or 64 discrete
TTL inputs per board. The TWD and TWB forms of M-variables are used for this board. The Acc-34x
family Serial I/O Multiplexer boards provides 64 I/O point per board, optically isolated from PMAC. The
TWS form of M-variables is used for these boards. The Acc-8D Option 7 Resolver-to-Digital Converter
board provides up to 4 resolver channels whose absolute positions can be read through the thumbwheel
port. The TWR form of M-variables is used for this board. The Acc-8D Option 9 Yaskawa
TM
Absolute
Encoder Interface board can connect to up to four of these encoders. The absolute position is read serially
through the multiplexer port on power up.
If none of these accessory boards is used, the inputs and outputs on this port may be used as discrete, non-
multiplexed I/O. They map into PMAC's processor space at Y address $FFC1. The suggested M-
variable definitions for this use are M40 to M47 for the eight outputs and M50 to M57 for the eight
inputs. The ACC-27 Optically Isolated I/O board buffers the I/O in this non-multiplexed form, with each
point rated to 24V and 100 mA.
Serial Connections
The PMAC Lite is provided with both RS232 and RS422 serial ports. To use the RS232 port on the 10-
pin J4 connector jumpers E107 and E108 must connect pins 1 and 2. To use the RS422 port on the 26-pin
J4A connector jumpers E107 and E108 must connect pins 2 and 3. Connectors J4 and J4A cannot be
used at the same time.
Delta Tau provides cables for connecting PMAC with a host computer. Acc-3D connects J4A to a DB-25
connector; Acc-3L connects J4 to a DB-9 connector. Standard DB-9-to-DB-25 or DB-25-to-DB-9
adapters may be needed for a particular setup.