Welcome to G-TV!
Today, I will be showing you to navigate through the settings of the Delta Products DTB Series
Temperature Controllers for PID control.
The DTB series has three modes of operation which include operation, regulation and initial
setting.
When power is applied, the controller goes into the operation mode.
I can press the set key to switch briefly to enter regulation mode.
If the set key is pressed for more than 3 seconds, the controller will switch to the
initial setting mode.
Pressing the set key while in the regulation mode or initial setting mode, forces the controller
to return to the operation mode.
The PV and SV sets the temperature set point and displays the temperature process value.
Using the arrow keys allows for me to set the temperature set point.
Before this can be done, I will need to define some settings.
I will enter the initial setting mode by holding the set button.
The first setting allows me to select the input sensor type.
The sensor type can be an analog input, platinum resistance or thermocouple.
I can change this by pushing the arrow keys to edit.
For demonstration purposes, I will set this setting to thermocouple type k, and then push
set button to save.
Adjusting this will send me to the operation mode.
I will need to hold down set for a few seconds to enter the initial settings again.
To toggle between the possible settings, I can push the return button.
The next setting here is to set the temperature unit.
Right now the unit is set for Celsius, to adjust this I will push the arrow key down.
I can change the C to an F and then press set to save.
Now that I have adjusted a couple of basic settings, I will go back into the initial
setting mode and scroll through the settings to show what they are.
I will use the return key to find the appropriate settings and not the arrow keys.
tp-H sets the upper limit of temperature range, tp-L sets the lower limit of temperature range,
CTRL sets the control mode, S-HC sets the heating and cooling control or allows me to
change to dual loop output control.
ALA 1, 2, and 3 set the three alarm mode settings.
SALA sets the system alarm; COSH enables or disables communication formats selection,
C-SL sets ASCII or RTU communication formats, C-NO adjusts the communication address settings,
BPS sets the communication baud rate setting, LEN sets the data length setting.
PRTY is the parity bit setting and the last setting is Stop for the stop bit setting.
To further show the complete list of operational commands, I will need to enable the alarm
functions.
I will scroll back to alarm 1 and change the value to a 1.
I will push set to save and then push it again to go back to the operation mode.
Next, I will enter regulation mode by pushing set briefly.
First is AT or Auto tuning.
I can switch this on by pushing the arrow up and then set to save.
Scrolling down with the return key, I have PID zero.
This value sets the PID mode selection.
Any one of 4 PID modes can be selected from zero to three.
When this is set to the number 4, the program will automatically select a PID mode that
is most useful for the target temperature.
I will use the arrow keys to move to 4 and then push set to save.
The next values correspond to the PID mode.
The SU 0 indicates which group this is by the zero value, had I put in a 1 for PID mode
selection, there would have been an SU 1 instead.
Scrolling through, I have proportion band setting, Ti setting, Td setting, and integral
deviation setting.
If the Ti setting is 0, I can set the PD control offset setting, but since the Ti setting was
not adjusted, the next value to regulate in scrolling is HTPD or the heating control cycle
setting.
This could also appear as CLPD for cooling control cycle if the setting S-HC in initial
settings was changed for cooling control.
The last setting is TPOF stands for regulate temperature deviation value.
Now I will go back into operation mode.
I can use the arrows to adjust the temperature set point.
Using the return key allows me to access the operation mode options.
The first one R-S controls setting run or stop, SP defines the decimal point position.
Since I allowed for the alarm to be enabled in initial mode, I have AL1H for the upper-limit
alarm 1 and then AL1L for the lower limit alarm.
I will continue to scroll down and LOC should appear on the screen for setting lock mode,
then OUT 1 which will display the value of the 1st output.
This displays in PID control mode and manual run mode only.
This completes an overview for PID settings using the DTB series.
For advance functionality and further documentation, please check out the docs and links on Galco’s
website.
The Delta Products DTB Series Temperature Controllers for PID control, along with thousands
of other products and services, are available at galco.com.