– The controller parameters are only written back to the controller with
UNDO_PAR or LOAD_PID when the controller gain is not 0:
For LOAD_PID, the parameters are only copied if the respective
GAIN <> 0 (either from the PI or PID parameter set). This takes into
account the case that no optimization has yet been performed or PID
parameters are missing. If PID_ON = TRUE and PID.GAIN = FALSE,
PID_ON is set to FALSE and the PI parameters are copied.
– D_F, PFAC_SP are set to default values by the tuning. These can
then be modified by the user. LOAD_PID does not change these
parameters.
– With LOAD_PID, the control zone is always recalculated
(CON_ZONE = 250/GAIN) even when CONZ_ON = FALSE is set.
15.5.5 FB 59 - TCONT_S - Temperature Step Control
FB 59 TCONT_S is used to control technical temperature processes with binary controller
output signals for integrating actuators. By setting parameters, subfunctions of the PI step
controller can be activated or deactivated and the controller adapted to the process.
Parameters
Parameter Declaration Data type Description
CYCLE INPUT REAL SAMPLE TIME OF STEP CONTROLLER [s]
n At this input CYCLE, you enter the sampling time
for the controller.
n Default: 0.0
n Range of Values: ³ 0.001
SP_INT INPUT REAL INTERNAL SETPOINT
n The SP_INT input is used to specify a setpoint.
n Default: 0.0
n Range of Values: Dependent on the sensors used
PV_IN INPUT REAL PROCESS VARIABLE IN
n An initialization value can be set at the PV_PER
input or an external process variable in floating-
point format can be connected.
n Default: 0.0
n Range of Values: Dependent on the sensors used
PV_PER INPUT WORD PROCESS VARIABLE PERIPHERY
n The process variable in the peripheral I/O format is
connected to the controller at the PV_PER input.
n Default: 0
DISV INPUT REAL DISTURBANCE VARIABLE
n For feed forward control, the disturbance variable is
connected to the DISV input.
n Default: 0.0
Description
VIPA SPEED7
Standard
PID Control > FB 59 - TCONT_S - Temperature Step Control
HB00 | OPL_SP7 | Operation list | en | 18-30 871
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