CONTROL BLOCK DIAGRAM
E5CK
A--5
CONTROL BLOCK DIAGRAM
Temperature
input
Digital filter
Input shift
Analog input
Digital filter
Scaling
Input type
Control method
Control mode
ON/OFF
control
PID control
ON/OFF control
3-position control
PID control
Control mode
Process/function
Control
Data
MV change
rate limiter
MV limiter
Heating
side
Cooling
side
MV change
rate limiter
MV limiter
Dead band
Error
Stop
Manual
MV at PV
error
MV at stop
Manual MV
Error
Stop
Manual
Manipulated vari-
able at heating side
Manipulated vari-
able at cooling side
Set point
limiter
Process
value
Set point
SP ramp
Heating and
Cooling control