sharply with an overall saw-tooth pattern, decrease the cooling gain. Alter the heat-cool overlap until a smooth response in the controlled temperature is observed during band transition.
Figure 21, Heat/Cool Operation (db<0)
Serial Communications Module (6-SC) (Optional)
Unless controller serial configurations match those of the host communicating device, front panel serial parameter changing is needed for communication. Baud rate and character frame must be the same as the other communicating device. The controller address is the unique node address for multiple controllers applications. (See Serial Communications Interface, page 58, for further explanations.)
Baud Rate (bAUd)
The available baud rates are:
300, 600, 1200, 2400, 4800, or 9600
Character Frame Format (ConF)
The character frame can be 7O1, 7E1, 7n2, or 8n1..
Controller Address Number (Addr)
Multiple controllers connected on the same RS485 interface line must each have a different address number. A value of 0 does not require the address specifier command, when communicating with the controller. The address numbers range from 0 to 99.
Abbreviated or Full Transmission (Abrv)
When transmitting data, the controller can be programmed to suppress the address number, mnemonics, units, and some spaces by selecting YES. An example of abbreviated and full transmission are shown below:
NO - 6 SET 123.8F<CR> <LF> Full Transmission
YES - 123.8<CR> <LF> Abbreviated Transmission
Print Options (PoPt)
Selecting YES for the print options allows the operator to scroll through the available options using the P button. The up and down arrow keys toggle between “yes” and “no”. “yes” enables the option to be printed when a print function occurs.
INP - Print Input Process Value
SEt - Print Setpoint Value
OPr - Print % Output Power Value
Pbd - Print % Proportional Band Value
INt - Print Integral Time Value dEr - Print Derivative Time Value
AL1 - Print Alarm 1 Value
AL2 - Print Alarm 2 Value dEv - Print Deviation From Setpoint Value
OFP - Print % Output Power Offset Value r_P - Print Ramp Rate
Crg - Print Relative Gain Value
Cdb - Print Deadband Value
OSt - Print Output Status rSP - Print Remote Setpoint Reading
HCr - Print Heater Current Reading
-44-
