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If the burner is fired up in MANUAL mode, the drives remain at low fire until modulated
manually.
If the modulation mode is changed from AUTO to MANUAL while the burner is firing,
the drives remain at their current positions.
1
- The unit powers up in the last selected modulation mode.
If the burner is fired up in MANUAL mode, the drives remain at low fire until modulated
manually.
If the modulation mode is changed from AUTO to MANUAL while the burner is firing,
the drives remain at their current positions.
2
- The unit powers up in the last selected modulation mode.
If the burner is fired up in MANUAL mode, the drives are modulated to the last positions
used in MANUAL mode.
If the modulation mode is changed from AUTO to MANUAL while the burner is firing,
the drives are modulated to the last positions used in MANUAL mode.
Option 02.6 - Position display type (0 – 3)*
It is possible to allow the servo-motor position to be displayed in angular degrees or percentage
opening, relative to their respective close and purge positions. Further to this it is also possible to
select the display resolution, selecting to 1 decimal place or no decimal place. Set this option to 0 to
select angular degrees and one decimal place, 1 for angular degrees and no decimal place, 2 for per-
centage opening and one decimal place or 3 for percentage opening and no decimal place,
Option 03.1 - System temperature units (0/1)*
When the RTD modulation input is selected or a flue monitor interface (FMI) board is installed, the
unit may be configured to display temperature in °C or °F. Set this option to 0 for °C units, or 1 for °F
units.
Note: Changing option 03.1 will only change the temperature units for the RTD input, the inlet tem-
perature display and the flue temperature display. All other temperature related parameters such as
setpoint control, limit values and alarm values must be entered to relate to the required range.
Option 03.2 - Modulation / measured value input type (0/1)*
The modulation input (terminals PA16-PA18) may be configured for 0-5V or 4-20mA operation. Set
this option to 0 to select 0-5V input type, or 1 to select 4-20mA input type.
Option 03.3 – Auxiliary modulation input function (0 – 2)*
The auxiliary modulation input (terminals PQ1-6) may be configured to perform a remote setpoint
function.
0
- No function. The input is ignored.
1
- Remote setpoint. The input determines the control value for the PID loop when
setpoint 1 is selected, providing the loop current is within the range of 3.5-21mA.
If the current is outside this range, the unit reverts to using the control value given
by option parameter 11.3. See parameters 11.7 & 11.8.
2
- Remote tracking input. The input determines the modulation rate, providing the loop
current is within the range of 3.5-21mA. If the loop current is outside this range, the unit
reverts to using the normal modulation rate (depending on current modulation mode).
This is different from using ‘track modulation input’ (option 11.0 = 0, or 13.0 = 1)
because an out of range signal will cause those options to hold low fire.
This function will override both set points 1 and 2.
4mA = low fire, 20mA = high fire.
Option 03.5 - Modulation Speed (25 – 100%)*
This option allows adjustment of the maximum modulation speed between 25% and 100% of the
fastest modulation possible while still obtaining the correct fuel/air ratio. When not modulating, all
drives move at their maximum speeds.
