PanelView 1200 Terminal Functions
Chapter 2
2-26
NonPrintable Characters
If you are printing screens, some graphic characters will not be printed.
Instead they will be replaced as follows:
ISA symbols, bar graphs, outer borders, arcs, diagonals and line
connectors will be replaced by ASCII character 219 decimal illustrated
below
23615
Character
219
Character
254
the first 32 characters, used for printer control, will be replaced by
ASCII character 254 decimal illustrated above
double width/height characters will be replaced by a single normal sized
character and the appropriate number of blanks
Example: the letter A, displayed with double height and width,
occupies an area 2 characters high and 2 characters wide. Once printed,
the A will occupy the top left position leaving the other three characters
blank.
Printer Errors
Printer errors can’t be indicated to the terminal directly. The terminal can
detect a print error only if the hardware or software handshaking is enabled
and the appropriate serial lines are connected from the printer to the
terminal. So, if the printer is out of paper or offline, and handshaking is
enabled, the printer will signal the terminal to stop sending characters.
If the error persists for more than 30 seconds, a minor error will be
reported asking the operator to ensure the printer is online. Once the error
is corrected, the terminal will continue sending characters to the printer.
Important
If you intend to use a serial printer, you will have to construct
your own cable. Use the pinout shown in Figure 3-2 to construct the
PanelView 1200 end of the cable. (Pin 20 detects the signal indicating
whether the printer is on or offline when using hardware handshaking.)
Consult your printer’s manual for the pinout at the printer end of the cable.
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