Loops Summary Table
(Original Document)
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Table
This table summarizes the elements associated with each type of loop.
Branch
Single loop
Process loop
Cascade loop
Auto selector loop
Master
Slave
Main
Secondary
Process standard process value
No
Yes
Yes (1)(2)
No
Yes
No
Single standard process value
Yes
Yes
Yes
Yes
Yes
Yes
Feed Forward
No
Yes
Yes
No
Yes
No
Single setpoint
Yes
Yes
Yes
-
Yes
Yes
SPP profile setpoint
Yes
Yes
Yes
-
Yes
Yes
Selection setpoint
No
Yes
Yes
-
Yes
No
Setpoint with ratio
No
Yes
Yes
-
Yes
No
ON OFF 2 states loop controller
Yes
Yes
No
No
-
-
ON OFF 3 states loop controller
Yes
Yes
No
No
-
-
PID loop controller
Yes
Yes
Yes
Yes
Yes
Yes
Heat / Cool PID loop controller (2)(3)
No
Yes
-
Yes
No
-
Split Range PID loop controller
No
Yes
-
Yes
No
-
IMC loop controller
Yes
Yes
Yes (1)(3)
Yes (1)
Yes (1)
Yes (1)
Heat / Cool IMC loop controller (2)(3)
No
Yes
Yes (1)
Yes (1)
Yes (1)
Yes (1)
Split Range IMC loop controller
No
Yes
Yes (1)
Yes (1)
Yes (1)
Yes (1)
Analog output
Yes
Yes
-
Yes
Yes
-
SERVO output
Yes
Yes
-
Yes
Yes
-
PWM output
Yes
Yes
-
Yes
Yes
-
(1) One loop controller, either master or slave.
(2) The totalizing function does not exist on the process value branch of the master loop.
(3) The autotuning function is not built into the PID/IMC Heat/Cool loop controllers.