INFICON STC-2000A Thin Film Deposition Controller Operating Manual - Manual (Page 114)

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STC-2000A DEPOSITION CONTROLLER
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Parameter
RS 232 BAUD RATE
RS 232 BAUD Values: 300, 1200, 2400, 9600
Units BAUD
RS 232 BAUD
RATE
RS 232 BAUD RATE
This parameter sets the host port communications baud rate. The higher the baud rate, the more
data bit transfer is increased which, generally speaking, results in faster communications. In an electrically
noisy environment, lower baud rates can be tried if communications fail at higher baud rates. In an
electrically noisy environment, the communications may not appear any faster using the higher baud rates
due to the increased number of message retries (corrupted messages are requested by the receiver to be re-
sent). Noise has a greater effect at higher baud rates because the duration of a noise pulse occupies a higher
ratio of time when compared with the duration of a signal pulse. Please ensure proper system grounding is
maintained as well as proper cable grounds and shields.
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Parameter
RS 232 PROTOCOL
Protocol types: Sycon, ASCII
Units None
RS 232
PROTOCOL TYPE
RS 232 PROTOCOL
This parameter sets the host port communications protocol type. The Sycon protocol has a higher
degree of integrity but is a proprietary protocol and will work with Sycon software only. The ASCII
protocol has lower integrity but is universally accepted. There is included with the STC-2000A a CD that
contains various software programs using both protocols.
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SECTION 3.XX page 114 of 292