Configuring A Loop Controller With Input Equal To The Average Value Of 3 Variables - gefran 3850T Use And Installation Manual

12. Select Variable to access the configuration page of the
variables associated with the PID controller.
Configure the PV parameter by selecting the variable
AI_01.
Configure the parameter OUT HEAT by selecting the
variable DO_01.
Configure the OUT COOL parameter selecting the
variable DO_02.
13. Select Alarms to access the PID controller alarm
threshold configuration page.
Verify that the alarm number selector, on the left side of
the screen, is 1.
Touch "EN" to enable alarm operation 1.
Configure the parameter AL to selecting the variable
(AL1) associated with alarm string 1.
Configure the OUT parameter selecting the variable
DO_03.
Touch + on the alarm number selector to select alarm
number 2.
Touch "EN" to enable alarm operation 2.
Configure the parameter AL to selecting the variable
(AL2) associated with alarm string 2.
Configure the OUT parameter selecting the variable
DO_04.
80703B_MHW_2850T/3850T_02-2019_ENG
7. EXAMPLES AND APPLICATION NOTES
14. Select Base to access the PID controller control pa-
rameter configuration page.
With the parameters displayed, you can configure the
actions of the PID controller.
7.7.2. Configuring a LOOP controller with
input equal to the average value of 3 variables
The example describes the procedure for configuring a PID
that uses the average value of 3 variables as an input. The
control is Heat/Cool type.
For this type of configuration, the instrument must have the
GETLogic option, necessary to calculate the average value.
For the configuration of the PID, the following variables
(signals) of the F-MIX module are used:
Type Name
Analog input (AI1)
Analog input (AI2)
Analog input (AI3)
Digital Output
(DO1)
Digital Output
(DO2)
The following user variables are also used to calculate the
average value:
Type Name
Average_val-
Register
To configure the PID loop with input value equal to the
average of the value of three input variables, proceed as
follows:
1. Login with level 2 password.
Description
AI_01 Input signal 1
AI_02 Input signal 2
AI_03 Input signal 3
Digital output 1 -
DO_01
Heat action
Digital output 2 -
DO_02
Cool action
Description
Average value for
ue PID input
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