Brookfield Temperature Controller, Model 106 - Manual (Page 18)

Brookfield Engineering Labs., Inc. Page 18 Manual No. M/98-206-A0402
perature Controller are formatted as a four digit integer number. Setpoint tempera-
tures being sent should first be multiplied by a factor of ten and expanded to four
digits with leading zeros if necessary. All temperatures (sensed or setpoint) being
read from the Programmable Temperature Controller should be divided by a factor of
ten to obtain the actual temperature.
The operator/user can develop a variety of programs for controlling the Programmable Temperature
Controller via the RS-232C protocol to meet specific needs of the laboratory. The following commu-
nication protocol can be used in any desired combination:
1) To read the current temperature, enter T {CR} at the external device.
The response from the Programmable Temperature Controller to the external device will be:
T{tttt}{u}{st}{CR}
where:
tttt indicates the current temperature multiplied by a factor of ten;
u indicates the temperature scale (
°
F or
°
C);
st indicates the present state of the Programmable Temperature
Controller (as described in Table 8 at the end of this section).
A typical response might be T2345F1, which means that the temperature is 234.5
°
F, and the con-
troller is presently in the run mode (1).
2) To read the current temperature setpoint, enter S{CR} at the external device. The response from
the Programmable Temperature Controller to the computer will be:
S{spspspsp}{u}{st}{CR}
where:
spspspsp indicates the current setpoint multiplied by a factor of ten;
u indicates the temperature scale (
°
F or
°
C);
st indicates the present state of the controller.
A typical response might be S1004C2, which means that the current setpoint is 100.4
°
C, and the
controller is in the wait or standby mode (i.e. the Programmable Temperature Controller is not
controlling the Thermo Container).
3) To adjust the temperature setpoint, enter RS{spspspsp}{u}{CR} at the external device where
spspspsp is the setpoint temperature multiplied by ten and u indicates the temperature scale in
either
°
F or
°
C.
A typical command sent to the controller might be RS1004C{CR}, which indicates the new setpoint
should be 100.4
°
C. The generic form of the response from the Programmable Temperature
Controller to the computer will be in the form:
RS{spspspsp}{u}{st}{CR}