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SCL2:lower limit for analogue input 2 (same as SCL but for input 2 - factory setting 0);
SCH2:upper limit for analogue input 2 (same as SCH but for input 2 - factory setting 100);
SPL: lower setpoint limit (same as SCL but for setpoint - factory setting 0);
SPH: upper setpoint limit (same as SCH but for setpoint - factory setting 100);
Example: for SIEMENS pressure sensor QBE2.. P25 (25bar), the input signal used is 0-10V: if you want to work between 5 and
19 bar, set SPL to 500 and SPH to 1900 (kPa). That way the setpoint scale can be set between 500 and 1900 kPa (5 and 19
bar).
OFF1:correction for analogue input 1 (factory setting 0)
OFF2:correction for analogue input 2 (factory setting 0)
OFF3:correction for analogue input 3 (factory setting 0)
HYST:"K6" auxiliary contact differential (factory setting 1)
dF1: delay applied to sensor signal to prevent transients (range 0-100sec.; factory setting 1 sec.)
6. Manual control
To control burner output manually, press the EXIT key for 5 sec. with the burner operating - the LED with the hand symbol
lights.
At this point, use the up arrow and down arrow to increase or decrease burner output.
To exit manual mode, press the EXIT key.
NB: Every time the controller switches the burner off (start enabled LED off - Q13-Q14 contact open), manual mode is disa-
bled when the burner is switched back on.
7. Instrument self-setting (auto-tuning)
If the burner in the steady state does not respond properly to heat generator requests, you can activate the instrument's
self-setting function, which recalculates PID values for its operation, deciding which are most suitable for the specific kind of
request
To activate this function, proceed as follows:
Press the PGM key and down arrow at the same time.
The green display reads tunE and the instrument forces the burner to increase and decrease output.
During these output oscillations, the instrument calculates the PID parameters (proportional band, integral time, derivative
time).
At the end of calculations, the tunE function switches off automatically and the instrument has stored the new parameters.
If you want to disable the self-setting function, press the up arrow once it has started.
PID parameters calculated by the instrument can be edited at any time following the procedure illustrated earlier in point 2.
Note:
If no key is pressed for ~10sec. during the instrument's setting, the instrument automatically exits setting mode and
returns to normal operating mode.
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