Annunciator Setup - Custom PID: Difference between revisions

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(Created page with "The annunciator supports up to two custom PID analog outputs. These outputs can be used to control a variety of processes and controls. A PID output can be configured on the PID Setup Screen (Pg. 674) by navigating from the main annunciator setup to “Outputs Setup” then “Custom PID”. Note: Only experienced personnel should adjust PID settings <nowiki>*</nowiki>Insert Image* ''PID Setup Screen'' To configure a PID output, select one of the two available PID l...")
 
 
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The annunciator supports up to two custom PID analog outputs. These outputs can be used to control a variety of processes and controls. A PID output can be configured on the PID Setup Screen (Pg. 674) by navigating from the main annunciator setup to “Outputs Setup” then “Custom PID”.
The Brain supports up to five custom PID analog outputs. These outputs can be used to control a variety of processes and controls. A PID output can be configured on the PID Setup Screen by navigating from the main setup to “Outputs Setup” then “Custom PID”.


Note: Only experienced personnel should adjust PID settings
Note: Only experienced personnel should adjust PID settings


<nowiki>*</nowiki>Insert Image*
[[File:PID Setup.jpg]]


''PID Setup Screen''
''PID Setup Screen''


To configure a PID output, select one of the two available PID loops at the top of the screen. Each setting is outlined below. When complete, select “Submit” to save, or “Disable” to disable that PID loop.
To configure a PID output, select one of the available PID loops at the top of the screen. Each setting is outlined below. When complete, select “Submit” to save, or “Disable” to disable that PID loop.
*Choose Output: Select this button to choose the analog output to use. All available analog outputs will be listed to select.
*Output Type: Choose 4-20mA, 1-5V, or 0-5V based on what equipment is driven
*Process Variable: Choose the process variable. This is the variable that will react to changes in the output.
*Setpoint: Choose the target setpoint for the process variable.
*Deadband: Choose a deadband for the setpoint. Within this deadband around the setpoint, the output will not be changed
*Max response rate: The max response rate is the percentage of the output range that will be changed in one second when the controller is moving at its fastest rate. This clips the change in controller output after the loop calculates the value.
*P,I,D term: These are the actual Kp,Ki,Kd constants
*Activation Criteria: Select this button to choose when the loop should be active.
*Inactive state: Enter what the output should be when the controller is not active


* Choose Output: Select this button to choose the analog output to use. All available analog outputs will be listed to select.
* Output Type: Choose 4-20mA, 1-5V, or 0-5V based on what equipment is driven
* Process Variable: Choose the process variable. This is the variable that will react to changes in the output.
* Setpoint: Choose the target setpoint for the process variable.
* Deadband: Choose a deadband for the setpoint. Within this deadband around the setpoint, the output will not be changed
* Max response rate: The max response rate is the percentage of the output range that will be changed in one second when the controller is moving at its fastest rate. This clips the change in controller output after the loop calculates the value.
* P,I,D term: These are the actual Kp,Ki,Kd constants
* Activation Criteria: Select this button to choose when the output should be active.
* Inactive state: Enter what the output should be when the controller is not active
* Name (optional): A name for the loop, e.g. "BYPASS"
* Allow S.P changes in 'Operator' access: If set to 'Yes', when the EIM is in 'Operator' access level the setpoint and deadband can be changed. Also allows the loop to be switched between Auto and Manual mode in 'Operator' access level.


=== PID Status and Auto / Manual Control ===
=== PID Status and Auto / Manual Control ===
If the annunciator version is greater than 744, the following is available.


Under the "Annunciator Faults / Outputs Status page", which is accessed by selecting the left box of the EIM Home Page, there is a "PID" category to see the status of all loops.
Under the [[Annunciator Fault & Output Status Screen|"Faults / Outputs Status page"]] reached by hitting the "Brain State" button of the home page, there is a PID category to view the PID status.


<nowiki>*</nowiki>Insert Image*
[[File:Status1 pidB.png|600px]]


Selecting a loop will navigate to the PID Status Page for that single loop, shown below.
Selecting a loop will navigate to the PID Status Page for that single loop, shown below.


<nowiki>*</nowiki>Insert Image*
[[File:Pid-status-single.png]]


On this page, the mode "Auto" or "Manual" can be selected if the access level is 'setup' or higher. In manual, the box on the right side of the page will show the manual setting, and can be selected to change the output.
On this page, the mode "Auto" or "Manual" can be selected if the access level is 'setup' or higher. In manual, the box on the right side of the page will show the manual setting, and can be selected to change the output.


On EIM versions past 2.00, the left box of the status page can be selected to change the setpoint and deadband (or all settings in 'Engineering' access level).
=== PID status gauge ===
 
Optionally a gauge can be added to the home screen to show the status of a PID loop. The gauge will show the current input and output values, and selecting the gauge will go to the single loop status page shown in the previous section.
 
See [[Annunciator Setup - Home Page Gauges]] for gauge setup, and the PID status gauges are under the "Other" category.
 
=== Adjusting Direction ===
 
If the loop runs backwards (when the input is low the output changes in the opposite direction to what is desired), simply change all the gains (P,I,D terms) to negative. Note that all the gains should be negative or all positive but never mixed.

Latest revision as of 20:22, 8 May 2024

The Brain supports up to five custom PID analog outputs. These outputs can be used to control a variety of processes and controls. A PID output can be configured on the PID Setup Screen by navigating from the main setup to “Outputs Setup” then “Custom PID”.

Note: Only experienced personnel should adjust PID settings

PID Setup.jpg

PID Setup Screen

To configure a PID output, select one of the available PID loops at the top of the screen. Each setting is outlined below. When complete, select “Submit” to save, or “Disable” to disable that PID loop.

  • Choose Output: Select this button to choose the analog output to use. All available analog outputs will be listed to select.
  • Output Type: Choose 4-20mA, 1-5V, or 0-5V based on what equipment is driven
  • Process Variable: Choose the process variable. This is the variable that will react to changes in the output.
  • Setpoint: Choose the target setpoint for the process variable.
  • Deadband: Choose a deadband for the setpoint. Within this deadband around the setpoint, the output will not be changed
  • Max response rate: The max response rate is the percentage of the output range that will be changed in one second when the controller is moving at its fastest rate. This clips the change in controller output after the loop calculates the value.
  • P,I,D term: These are the actual Kp,Ki,Kd constants
  • Activation Criteria: Select this button to choose when the loop should be active.
  • Inactive state: Enter what the output should be when the controller is not active


PID Status and Auto / Manual Control

Under the "Faults / Outputs Status page" reached by hitting the "Brain State" button of the home page, there is a PID category to view the PID status.

Status1 pidB.png

Selecting a loop will navigate to the PID Status Page for that single loop, shown below.

Pid-status-single.png

On this page, the mode "Auto" or "Manual" can be selected if the access level is 'setup' or higher. In manual, the box on the right side of the page will show the manual setting, and can be selected to change the output.

PID status gauge

Optionally a gauge can be added to the home screen to show the status of a PID loop. The gauge will show the current input and output values, and selecting the gauge will go to the single loop status page shown in the previous section.

See Annunciator Setup - Home Page Gauges for gauge setup, and the PID status gauges are under the "Other" category.

Adjusting Direction

If the loop runs backwards (when the input is low the output changes in the opposite direction to what is desired), simply change all the gains (P,I,D terms) to negative. Note that all the gains should be negative or all positive but never mixed.

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