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5. Examples and applicative notes
Changes possible in stop state
When the programmer is stopped, you can set or change:
•
active setpoint;
•
current step time;
•
program number;
•
step number;
•
phase or segment (ramp or hold).
Consents
You can assign up to 4 consents to each step.
Therefore, the start of a step can depend on a defined state
of consents. If the state does not agree with the program-
med state, the time base stops.
If the state agrees with the programmed state, execution
proceeds with restart of the time base. Each digital input
can be assigned to one consent.
Events
You can assign up to 4 events to each step. At the start of
the ramp and at the start of the hold of each step, the even-
ts are changed as programmed. Each digital output can be
assigned to one event
Other functions
•
End program signal, with or without forcing of control
outputs.
•
Setting of a tolerance band relative to the setpoint. If
the variable is outside the band, the time base is stop-
ped (HBB alarm, Hold Back Band).
•
Setpoint slaved with the same time base to manage a
slaved controller via analog retransmission output A1.
•
Total modularity of functions and parameters, with easy
exclusion of ones not required
5.13.3. Programmer behavior
The change in local setpoint, which occurs during a program
stop phase, causes the restart of the step in execution, with
conservation of the set ramp time.
If the controller is switched off and then on again, program
execution can continue, or restart from the first step, or sear-
ch for the step with the setpoint closest to process variable
PV.
Behavior at restart is defined by the value of the parameter
Strt on the PR.OPT submenu.
STOP/START switching at end of program resets the pro-
gram and restarts the program.
The Autoreset function implies that programmer reset is acti-
ve in the stop phase, with consequent acquisition of PV va-
lue as active setpoint and resetting of the time base.
With the controller in manual, or with remote absolute
setpoint, the programmer time base is stopped.
When switching from remote to local setpoint, the setpoint
assumes the value of the remote setpoint at the time of swi-
tching if the parameter LO.rE = BUMPL.
150
5.13.4. Program examples
5.13.4.1. ONE STEP program
Project conditions:
•
ramp time = 0;
•
hold;
•
HBB enabling;
•
switch-off
SP
Set point
PV
RSET
STRT
5.13.4.2. ONE STEP program
Project conditions:
•
ramp time = 0;
•
hold;
•
HBB enabling;
•
hold at end of program.
SP
Set point
PV
RSET
STRT
5.13.4.3. Program with assigned events
Project conditions:
•
Evnt.1 On during STEP1;
•
Evnt.2 On during hold of STEP1;
•
Evnt.3 On during ramp of STEP2;
•
Evnt.4 not used.
STEP1 - setting events at start of step:
•
EVN.r.1 = On
•
EVN.r.2 = OFF
•
EVN.r.3 = OFF
•
EVN.r.4 = nonE
STEP1 - setting events at start of hold:
•
EVN.h.1 = nonE
•
EVN.h.2 = On
•
EVN.h.3 = nonE
•
EVN.h.4 = nonE
80208G_MHW_650-1250-1350_01-2017_ENG
Wait band
Wait band
Soak time
END display
END output
Wait band
Wait band
Soak time
END display
END output
time
time
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