Scientech S200 Vector - Manual (Page 27)

Setting the handshake method to XON causes the instrument to cease transmission upon receipt of an
XOFF character (ASCII 19, CONTROL-S), and to resume transmission upon receipt of an XON character
(ASCII 17, CONTROL-Q).
Care should be taken when setting the handshake method from an RS232 communications device, to insure
that the device then begins using the handshake method chosen.
IEEE488 INTERFACE
When IEEE488 is selected, the front panel display is non-functional. The D200P, D200PC, D200C, S200,
and AD30 devices may be equipped with an ANSI/IEEE Std 488.2-1987 interface. Section 4.9 of that
standard requires that certain documentation accompany devices with such an interface. The following
paragraphs have the same numbers as the paragraphs of Section 4.9 in the standard document to which
they refer:
(1) Interface Functions subsets implemented:
SH1 -- Source Handshake Capability
AH1 -- Acceptor Handshake Capability
T6 -- Talker (basic talker, serial poll, unaddressed to talk if addressed to listen)
L4 -- Listener(basic listener, unaddressed to listen if addressed to talk)
SR1 -- Service Request Capability
RL1 -- IEEE488.2 Remote/Local Capability
PP0 -- No parallel poll capability
DC1 -- Device clear capability
DT0 -- No device trigger capability
(2) IEEE Address Out of Range:
The instrument address is set from the front panel, and the instrument firmware accepts addresses only
within the range 0-30.
(3) Effective time of user address change:
This is described under IEEE 488 SETUP.
(4) The device settings at power On are described separately for the D200, S200, and AD30 in Appendix B
to the Setup and Operating Procedures.
(5) Message Exchange Options
a) The input buffer is seventy five characters. Each character received generates an interrupt to the
processor, which notifies an input routine that an input byte is available. The input routine places the
character in the input buffer for examination by the parser. The characters are removed from the input buffer
and translated with appropriate syntax checking. If any input message exceeds the length of the input buffer,
a COMMAND ERROR is generated, and the message is ignored.
b) The RPT?, COL?, and DUMP? queries generate more than one response message unit.
c) All queries generate a response when parsed.
d) No queries generate a response when read.
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