Asyst Technologies VersaPort 2200, Technical Manual

Page: 215 / 288

Released Rev. C 2000-1252-01 Page 197
VersaPort 2200 Technical Manual
Appendix B: Communications Software
Parallel Communication
a
Parallel Communication
The VersaPort can be configured for parallel communications and will support Open and
Close commands issued by a parallel host in Auto mode.
Figure 45, OPEN Cycle Event
Diagram, on page 200 and Figure 46, CLOSE Cycle Event Diagram, on page 201 depict
the communication between the Host and the VersaPort.
Summary of Control Signals
Control Signal Descriptions
(HOST) *READY to OPEN (INPUT)
This signal instructs the VersaPort that the Host is ready to receive a cassette. If
both the
*Ready to Open and the *Ready to Close signal are inactive, the
remote *Open/Close command issued by the Host through the parallel
communication interface will be ignored. When the parallel-host-communication
lines are connected, the Host must set this line to active before an open command
could be accepted by the VersaPort. This signal does not affect the status of any
output signal from the VersaPort to the Host. Both the
*Ready to Open and
*Ready to Close signals should never be active at the same time.
T
ABLE
31
Input Signals
Input Effect In Manual Mode Effect In Alarm State
*ENABLE/
DISABLE
Do not care Do not care
*READY to OPEN
Do not care Do not care
*READY to CLOSE
Do not care Do not care
*OPEN/*CLOSE
Do not care Do not care
*CLEAR ERROR/
*HOMING CAL
Do not care
Required active for
clearing alarm
T
ABLE
32
Output Signals
Output
Signal Level In Manual
Mode Signal Level In Alarm
State
*READY
Inactive Active
*POD IN PLACE
Inactive Shows Pod status
*HOME
Inactive Shows Home status
*ERROR
Shows error status Active
*AT OPEN POSITION
Inactive Shows open status