Instructions
9.4 PID basic functions
PID control
500 Function Manual, 03/2017, A5E35300227-AC
Manual value processing (LMNS_ON, LMNUP, LMNDN)
With LMNS_ON, you can change between manual and automatic mode. In manual mode,
the actuator is halted and the integral action (INT) is set to 0 internally. Using LMNUP and
LMNDN, the actuator can be adjusted to OPEN and CLOSED. Switching over to automatic
mode therefore involves a bump. As a result of the GAIN, the existing control deviation leads
to a step change in the internal manipulated variable. The integral component of the
actuator, however, results in a ramp-shaped excitation of the process.
Block diagram TCONT_S (Page 501)
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