Figure 6-3 Hpgl Rs232 I/F Flow Control Commands - Brainboxes PS-307 User Manual

PSI BOX Reference
parameters may be specified and a response from the PSI BOX
may be expected.
______________________________________________ _

Figure 6-3 HPGL RS232 I/f Flow Control Commands.

ESC.( Turn plotter On.
ESC.Y Turn plotter On.
ESC.) Turn plotter Off.
ESC.Z Turn plotter Off.
ESC.@ Set monitor mode.
ESC.B Output Available Buffer Size.
ESC.E Output Error Status Code.
ESC.H Handshake Mode 1.
ESC.I Handshake Mode 2.
ESC.J Abort Flow Control Command.
ESC.K Abort Plot, Clear Buffer.
ESC.L Output Maximum Buffer Size.
ESC.M Specify Output Mode.
ESC.N Specify Output Mode.
ESC.O Output Buffer Status Code.
ESC.R Initialise Handshake Parameters.
Addressed Operation. ___________________
Since Mode 8 requires the plotter to both listen to HPGL
plotting commands and reply to HPGL output command the
plotter must be set for addressed operation. It must not be set for
Listen only use.
The PSI BOX acts as the IEEE controller and is the source
of all IEEE commands. It controls the flow of data on the IEEE
bus by addressing the plotter to talk or listen. Only one IEEE
device, the plotter, can be accessed when in this mode.
The address of the plotter that the PSI BOX accesses is as
set on the IEEE address DIP switches. The PSI BOX sends a
LISTEN command to the plotter before each HPGL command is
sent, when the trailing CR character is detected the PSI BOX
waits ready to address the plotter again.
If no RS232 bus activity has occurred for 3 seconds, and
the PSI BOX RS232 input buffer is empty then the PSI BOX
polls the plotter for any response it may have. The plotter is
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Modes 1-6 & 8.
Chapter 6