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Printer Operations
Configuring for Printer Operations
5
5-5
Configuring for Printer Operations
Correct operation of the instrument RS-232 link with a printer depends on the link
parameters baud rate, parity, and CTS (Clear To Send). Perform the procedure in Figure
5-3 to establish communication link parameters. Refer to your printer manual for
information on selecting identical parameters for the printer, usually through the setting
of DIP (dual in-line package) switches (with the printer unpowered). The instrument uses
a fixed one start bit and one stop bit.
SHIFT
LIST
38400
19200
9600
4800
2400
1200
600
300
bAUd
ENTER
ENTER
PAR
no
E
Odd
ENTER
Echo
On
OFF
CtS
On
OFF
ENTER
Typical
Required
Selecting the bAUd (Baud) Rate. Press the
SHIFT key, release, and then press the LIST key
to open the communications parameters menu.
The baud rate sets the rate of data transfer
between the instrument and the printer.
Normally, the highest compatible rate is selected.
Select the rate using the up/down arrow keys
then press ENTER.
Selecting PAR (Parity). The 8th bit of a
character can be set to make all characters odd
(Odd) or even (E), or no parity at all (no). The
printer checks parity (if selected) and indicates
when an error is detected. Select the parity then
press ENTER.
Selecting CtS (Clear To Send). The RS-232
CTS line (pin 8) is an input control line from the
printer Request to Send (RTS) line (pin 4). When
CTS is a Logic high, the instrument is allowed to
transmit data. If the printer RS-232 interface
does not have or use an RTS line, select OFF
then press ENTER.
Selecting Echo. When echo is On, each
character sent to the instrument is "echoed" back
to the host. For this RS-232 application, Echo
has no meaning because the printer does not
send characters to the Hydra. Make the
selection then press ENTER.
op55f.eps
Figure 5-2. Configuring the RS-232 Ports for Print Operations