Pacific UPC-12, Operation Manual

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SECTION 10 SERIAL REMOTE INTERFACE
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10.5.1 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.
10.5.2 FUNCTIONAL EXCEPTIONS
Some functions applicable with the IEEE-488 interface are NOT applicable with the RS-232 interface.
Specifically they are the following:
1. All IEEE-488.1 interface functions (see UPC MANUAL sect. 5.6.1).
2. IEEE-488.2 commands: *SRE and *SRE? , are ignored, as Service Requests and Serial Polls
are not applicable. (see UPC MANUAL sect. 5.5.3.1).
(Use *STB? to obtain the Status Byte.)
10.5.3 FUNCTIONAL ADDITIONS
The following commands have been added to replace functions lost due to the removal of the IEEE-
488.1 GPIB. These commands are similar to the IEEE-488.2 Common Commands and fall into the
category of DEVICE CONTROL COMMANDS (see section 5.6.2 of the UPC Manual).
*DCL DEVICE CLEAR - Causes a Hardware RESET of the UPC.
*LLO LOCAL LOCKOUT - Puts the UPC into REMOTE with LOCAL LOCKOUT state.
*GTL GOTO LOCAL - Restores LOCAL mode.