Current time of segment (ramp or hold) in
HH:MM or MM:SS (see time base)
Flashing LED when program is in RUN. LED on
steady when program is in STOP, END,
HOLD and time base stopped.
Dynamic indication of segment (ramp or
hold); off at the end of program
Flashing LED in modification phase
Flashing letter “P” in programmer state
modification phase
N° of current step
N° of current program
EXAMPLE of programmer state display:
Program = 2, Step = 5, Segment = Hold, time elapsed = 20:42 (MM:SS)
The setpoint can be changed directly from the keyboard only when the program is in STOP.
To change programmer state, press the “Lower” key for 2 seconds: the letter “P” will start flashing rapidly. Press key “F” to scroll: program, step, segment,
time.
Flashing of the decimal point in each element indicates that the value is enabled for modification (“P” flashes slowly).
Use the “Raise” and “Lower” keys to set the required values. Press the “Lower” key for 2 seconds while “P” flashes rapidly or go to START to disable
programmer state modification phase.
Program change automatically generates a reset.
Reset state is also entered by setting current step 0 (zero) and setting the current segment to “off” (lower right digit off).
8 • STATE OF THE PROGRAMMER
F
F
F
F
F
Level 1 display:
programmer
state
for 2 sec.
modify program
modify step
modify segment
modify time
Programmer
modification phase
Restart with step search
The example shows a typical setpoint profile that can be programmed by setting a single 5-step program. At start, if parameter Pty = 2 (in ProG), the
program searches for the setpoint with value equal to PV. The search is performed by moving the current time forward or backward, skipping phases or
steps. If the variable is lower than that required during a setpoint increase phase (point A, t1), at restart the current time base is lowered by intercepting the
setpoint profile (point A1).
If the variable is lower than that required during a setpoint decrease phase (point B, t2),
at restart the current time base is raised by intercepting the setpoint profile (point B1). If
interception is not possible, as in the case of variable at PV1, program restart occurs at the
current time and setpoint.
If the Hbb control is enabled, the programmer time base remains stopped until the variable
re-enters the set tolerance band, symmetrically placed around the setpoint.
PV1
1
2
3
4
t1
t2
A1
A
B1
B
PV
/
Set point
Step 0
time
Display / Modification of programmer state
*
*
access
granted only
with program in
STOP
In this mode, the maximum duration of a step is 30 seconds
In fast simulation mode, hold back band (Hbb) is inhibited, and control output takes on FAc.P value.
All other functions enabled (type of restart, start/stop, reset, manual/automatic, end of cycle or continuous cycle, event outputs, clearance from digital inputs,
slave channel setpoint, etc.) are active.
- Autoreset means that programmer reset is active in Stop phase, with acquisition of the variable as current setpoint and resetting of time base.
- With the controller in manual or with absolute remote 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 switching.
Program control from panel:
In the absence of enabled digital inputs, alarms, M/A key (butt = 10, 11), program control engages when programmer state is displayed by using the Raise,
Lower, and M/A keys.
Raise in stop = START; Lower in start = STOP; M/A pressed for 2 seconds = RESET (condition maintained with key pressed); Lower for 2 seconds in stop =
enable change of programmer state.
When programmer state is not displayed, M/A key maintains function selected with “butt.”
Programmer Reset Mode:
With standard function, when the control is active the setpoint takes on the value of the process variable and power is forced to zero.
When parameter “_ _ r.t.” is set to +16 and the reset control is active, the current setpoint (prior to reset) and power control are maintained.
This function is applicable with reset from digital inputs or enabled keys, and also with reset following a program change (possible only in STOP) or from
STOP/START switching at the end of a program.
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80090G_MHW_1600-1800P_04-2013_ENG
