5 - 4
Controllers and Programmers
Setup data
C21
allows the user to select the controller function or the programmer function.
●
Controller
PID controller computations can be performed using PV, SP and PID set values
and the result of the manipulated variable is output via an analog output.
ON-OFF control can be used instead of PID control.
In the MANUAL mode, manipulated variable levels can be controlled by keys
available in the basic display status.
●
Programmer
PID control computations are not performed and 4 to 20mA output of scaled SP
signals are output.
In the MANUAL mode, SP levels can be controlled by keys available in the basic
display status.
NOTE
The constant value control mode cannot be invoked when the programmer
function is used.
5-29
Controlled process
DCP551
Controller
PV
MV
Chapter 5. FUNCTIONS
Controlled process
Controlled process
Controlled process
DCP551
Programmer
PV
MV
SDC series
controller
PV
MV
SDC series
controller
PV
MV
SDC series
controller
SP output
4 to 20mA
RSP input
PV
