Chapter 4: Using Your RapidVap
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34
Original instructions
RS-232 Communications
Some RapidVaps are equipped with RS-232 communications capabilities. This
hardware and software allows a user to perform all the front panel functions from a
standard RS-232 link. Communications will be at 4800 baud, no parity, 8 bit
word, 1 stop bit, and a 3-wire interface (TXD, RXD and circuit common). The
RS-232 link will be duplex or two-way, that is, it will allow the RapidVap Basic
and N
2
models to be controlled externally (incoming commands) as well as
provide status information coming out of the RapidVap (outgoing status). All
communications will be done in standard ASCII format using the programming
syntax below.
RS-232 Programming Syntax
The RapidVap only responds to commands sent by the connected computer or
terminal – it does not send out commands on its own. The programming syntax
has two forms:
1.
# [command abbreviation letter] [value]
; when the command requires a
numeric value.
2.
# [command abbreviation letter ]
; when the command does not require a
numeric value.
When the programming syntax contains a numeric value, it will change the
operation of the RapidVap. When the programming syntax does not contain a
numeric value, the RapidVap will respond with its current status for that command
value.
Note that the lead-in character is “#” while the “[ ]” (brackets) are shown only to
separate parameters for ease of understanding. These brackets will not be used in
the actual ASCII command string. Finally, the “;” is used to indicate the end of a
command. Also note that ‘\n’ indicates a newline character.
#R[x];
x=0 for stop, x=1 for run and x=2 for pre-heat, will get a x’\n’
response for confirmation; when a “#R;” with no “[x]” is sent,
the RapidVap will respond 0, 1 or 2
#S[xxx];
Selects the vortex speed of program 9 from 0% or 12% to
100%, will get a xxx;yyy’\n’ response for confirmation.
(xxx:speed setpoint, yyy:actual speed)
#T[xxx];
Selects the HEAT TEMPERATURE SET POINT of program 9
from 30 to 100 (C), will get a xxx;yyy’\n’ response for
confirmation. (xxx:temperature setpoint, yyy:actual
temperature); by entering “#T0;”, the heat will be set to OFF
