Zapi ACE0 2mC, User Manual

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AF6ZP0CA – COMBIAC0 & ACE0 2uC – User Manual Page – 95/155
parameter.
The battery-charge detection works as the following procedure.
Start-up
1) The battery voltage is read from key input when the battery current is
zero, which is when the output power stage is not driven. It is evaluated
as the average value over a window of time, hereafter addressed as
Vbatt.
2) Vbatt is compared with a threshold value which comes as function of the
actual charge percentage; by this comparison a new charge percentage is
obtained.
3) The threshold value can be changed with the BDI ADJ STARTUP
parameter.
4) If the new charge percentage is within the range “last percentage (last
value stored in EEPROM) ± BDI RESET” it is discarded; otherwise charge
percentage is updated with the new value.
Operating condition
Measure of the battery voltage, together with the charge percentage at the time
of the voltage sampling, give information about the instantaneous battery current.
1) The battery voltage is read when the battery current is not zero, which is
when the output power stage is driven. Vbatt is evaluated as the average
value over a window of time.
2) Vbatt is compared with a threshold value which comes as function of the
actual charge percentage; by this comparison the current provided by the
battery is obtained.
3) Current obtained at step 2 integrated over time returns the energy drawn
from the battery, in Ah.
4) Charge percentage is dynamically updated basing on the energy from step 3.
4) Threshold values for the battery charge can be modified by means of
BAT.MAX.ADJ. and BAT.MIN.ADJ. as to adapt the battery-charge detection
to the specific battery in use.
9.11 EVP Setup
When the EVP is set as ANALOG (see paragraph 8.2.1) the output is managed
as explained in the following example.
Considering the case in that the EVP request is concerning the lowering valve,
the MIN EVP parameter (see paragraph 8.2.1) determines the minimum current
set point applied to the valve when the position of the potentiometer is at the
minimum (MIN LOWER) (see paragraph 8.2.1).
Then, the current set point applied to the valve increases proportionally with the
potentiometer voltage up to the maximum (MAX EVP) (see paragraph 8.2.1),
reached when the position of the potentiometer is at the maximum (MAX
LOWER) (see paragraph 8.2.1).