SECTION 10 SERIAL REMOTE INTERFACE
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10.3 SETUP
After installing RS-232 interface into the UPC (or after erasing all program memory or after system
RESET), the RS-232 communication parameters must be set (BAUD RATE, PARITY and EOS
Terminator) as follows:
1. Press the fn key, select GENERAL SETUP then UPC STATUS.
2. Press the EDIT key and type the desired BAUD RATE numerically, selected from the list above.
Then press ENTER.
3. Select the PARITY by pressing the +/- key until the desired selection (NONE, ODD or EVEN) is
shown. Then press ENTER.
4. Select EOS (End Of String) Terminator by pressing the +/- key until the desired selection
(CR/LF, LF or CR) is shown. Then press ENTER.
5. Press STORE.
NOTE
: Incorrect communication parameters may result in the UPC displaying a:
PARITY ERROR,
FRAMING ERROR, and/or
OVERRUN ERROR.
Sending a BREAK signal will result in a BREAK RCVD message and will terminate data transmission in
progress from the UPC.
10.4 OPERATION
Operation of the UPC via RS-232 REMOTE interface consists of utilizing the same commands available
for the IEEE-488 interface (see Section 5) except as noted in the following paragraphs.
NOTE
: Normally the UPC is in the LISTENER mode. When the UPC is Queried for information, the
UPC automatically enters the Talker mode until the response data is sent or another command is sent
from the Host.
10.4.1 COMMUNICATION MONITORING AID
The UPC STATUS Display (fn,3,3) displays "LISTENER" while data is being received from the HOST, or
"TALKER" if a Query response (Message Available) is available and has not yet been completely sent by
the UPC.
The UPC STATUS Display will display the LAST DATA BYTE received from the HOST. Carriage
Returns are displayed as Line Feeds (0Dhex shown as 0Ahex).
The UPC STATUS Display also will display "RTS" if the Request To Send signal from the HOST is true.
This signal must be true to allow the UPC to send data. To monitor CTS (Clear To Send) from the UPC,
use the Host or a probe at the Host end of the Serial Interface cable. The Host must not send
commands or data unless CTS is true.
This monitoring aid is not updated as fast as serial communications can occur, therefore sudden
changes on the Serial Interface may not be seen on the UPC display.
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