Brookfield Bath, Model TC-101 - Manual (Page 14)

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— RS232 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Allows selection of 1200 BAUD or 9600 BAUD (default setting). An IBM 9-pin D-
subminiature straight wire serial RS232 communication cable is supplied. Older XT
computers only have a 25-pin connectors. If you purchase a 25-pin connector to 9-pin
cable or adapter, it must be a “NULL MODEM” type. If not, pins 2 and 3 of the 9-pin
side of the connection must be reversed, or there will be no response from the RS232.
See section 4.4 for additional information.
Direct Manual Control of Circulator Via a Modem Program on a PC
Communication software may also be used in RS232 function to enter settings.
Communication Parameters:
Baud rate : 9600
Data bits : 8
Stop bits : 1
Parity : none
Flow control : none
Terminal emulation : VT-100
Command Set Definitions
T - returns current fluid temperature
S - returns current setpoint temperature
I - returns controller model identity
RA[z] - change operating mode (z = controller state digit)
(i.e. RA1 = ON; RA2 = OFF)
RS[ssss][u] - change setpoint
(ssss = setpoint multiplied by 10; u = unit digit (either F or C))
Controller Responses
? - illegal command
T[tttt][u][z] - tttt = current temperature (multiplied by 10)
S[ssss][u][z] - set point temperature displayed with temperature scale letter
and unit status number
(ssss = setpoint multiplied by 10, u = unit digit (either F or C);
z = controller state digit)
I[xxxxxx] - TC-501 = controller ID string
RS (ssss) (u) (z) change of setpoint temperature displayed with temperature scale
letter and unit status number
RA[z] - controller status
RA1 - controller on
RA2 - controller off, in 'standby' mode
RA3 - no probe connected to controller
RA5 - temperature reading is above or below allowable limits
RA6 - temperature input value outside the allowable limits
SELECT BAUD RATE
1 = 1200
2 = 9600