5.13.4. 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 search for the step with the setpoint closest to process variable PV.
5.13.5. Program examples
5.13.5.1. ONE STEP program
Project conditions:
• ramp time = 0;
• hold;
• HBB enabling;
• switch-off
SP
Setpoint
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 program and restarts the program.
PV
The Autoreset function implies that programmer reset is active in the stop phase, with consequent acquisition of PV value 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.
RSET STRT
SP
Soak time
When switching from remote to local setpoint, the setpoint assumes the value of the remote setpoint at the time of switching if the parameter LO.rE = BUMPL.
5.13.5.2. ONE STEP program
Project conditions:
• ramp time = 0;
• hold;
• HBB enabling;
• hold at end of program.
When the programmer reaches the END state, the third bargraph, used for example on models 1650-1850 to display delivered power, lights up completely.
Setpoint
At exit from programmer END state, the third bargraph once again shows the value of the quantity set in parameter bAr.3
(HOME.1 menu or HOME.2 menu).
PV
Wait band
Wait band
END display
END output tempo
Wait band
Wait band
RSET STRT Soak time END display
END output tempo
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