Delta A Series User Manual download pdf (Page 8)

9 Current Transformer (CT) Function

The Current Transformer (CT) function is used with the alarm output. When using a current transformer (CT) with the controller, change the

corresponding alarm output mode to mode 13 (alarm output set value is 13), then turn to operation mode and set the current lower-limit and

current upper-limit. You can set current alarm range between 0.5A ~ 30A, display resolution is 0.1A and measure accuracy is +/- 0.5A.

10 EVENT Inputs Function

There are two optional event inputs (contact inputs) supported (EVENT1and EVENT2) in DTB series.

EVENT1: RUN/STOP operation can be executed by RUN/STOP parameters (Operation Mode) or via the communication. User also can

control RUN/STOP operation by EVENT 1 in DTB series. The control output is ON if the circuit of EVENT 1 is open when the

controller is operating. Otherwise, the controller will stop output if the circuit of EVENT 1 is short or when the system parameter of

the controller is set to STOP mode.

EVENT2: DTB series allows user can switch two temperature setting value by changing the status (open/short) of EVENT 2. Each

temperature setting value has independent control parameters.

11 PID Program Control (Ramp/Soak Program Control)

Description of Function and Parameters Setting:

PID program control by 8 patterns (Pattern No. 0~7) is supported in DTB series. Each pattern contains 8 steps (step No. 0 ~ 7), one Link

Pattern parameter, one Cycle parameter and one Actual Step parameter.

Start Pattern:

is in operation mode and it is used to set the Start Pattern of PID program control (This parameter appear in

mode only).

Steps : Include set point X and execution time T, these two parameters setting. The set point (SV) should reach temperature X after the period

of execution time T. If the set point is the same as the result of the previous setting, then it is called Soak program control. If not, then it

is called Ramp program control. Therefore, PID program control is also called Ramp/Soak program control. The default of step No. 0

in this controller is Soak program control. The controller will control the temperature (PV) to reach the set point X and then keep the

temperature at set point X. The period of execution time is time T which provided by step No. 0.

Link Pattern Parameter : For example, when set

to 2, it indicates that pattern No. 2 will execute next after the execution of pattern No.

0. If set to

, it indicates the program will stop after executing the current pattern and the temperature will keep at the set point of

the last step.

Cycle Parameter : Additional execution cycle number. For example, when set

to 2, it indicates that pattern No. 4 should execute twice

in addition. Include origin one time execution, total execute three times.

Actual Step Parameter : Execution step number per pattern (can set to 0 ~ 7). For example, when set

to 2, it indicates that pattern No

7 will not execute other steps than step 0 to step2.

Execution : When

is set to , the program will start to execute in order from the step 0 of start pattern. When is set to

, the program will stop and the control output is disabled. When is set to , the program will stop and the temperature

at that time will be controlled at the set point before program stop. Select

again, then the program will restart and execute from

step 0 of start pattern. When

is set to , the program will hold and the temperature at that time will be controlled at the set

point before program hold. Select

again, then the program will follow the step before hold and start to execute through the rest

of the time.

Display : During PID program control, the SV default display is P-XX, P indicates the current execution pattern and XX indicates the current

execution step. Press

to change the display item. After select , press key, and then the temperature set point of the

current execution step will display on SV display. After select

, press key, and then the residual time of the current

execution step will display on SV display.

12 PID Control

One group can be selected from any one of 4 groups PID parameters (P, I, D, IOF) for PID control. After AT, PID value and temperature setting

will be stored in the selected one group.

~ : PIDn, n=0~4 from which 0~3 correspond to each PID parameter. : n=4, auto PID

parameter. Program will automatically select a most useful PID parameter based on current temperature setting. Displayed SV values

correspond to

~ : Temperature setting corresponded to the selected PID parameter via user-defined or AT.

Valve Control:

When use valve control as output control, there are 2 Relay outputs for motor forward/reverse control, one (output 1) for valve open the other

(output 2) for valve close. The output volume is controlled by valve open/close and it can be set with feedback function enabled or disabled.

When feedback is disabled, output 1 will keep output while valve fully opens and output 2 will keep output while valve fully closes. But if

feedback is enabled, please follow the parameter setting for valve control as follows:

: Time for valve from full close to full open.

: Dead Band setting of valve. The value of current valve output minus previous one must be greater than Dead Band value; otherwise,

valve will remain OFF.

: Signal feedback setting, ON for enabling feedback and OFF for disabling feedback.

When

set to ” 1”, it means signal feedback function is activated and will come up selections as follows:

: Upper/Lower limit of valve feedback by auto-tuning. must set to for showing up this selection.

: D/A value when value fully opens. Set to be ”1” for auto setting or ”0” for manual setting.

: D/A value when value fully closes. Set to be ”1” for auto setting or “0” for manual setting.

Note: If feedback function setting is with problem, program will see the setting as feedback disabled.

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Delta A Series User Manual Page 8

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