I'v write a test script to study ups auto shutdown feature.
It write 120 into ups mcu reg 24, then sleep 10s, then read from reg 24, it was 119 instead of 110 , so the unit of shutdown delay seems 10 second, in other words, decrease by 1 every 10s.
my test script
print("set ups power shutdown delay to 120s")
ups.shutdown_delay = 120
time.sleep(10)
#the unit seems is 10s
#check value
print(f'current ups shutdown delay {ups.shutdown_delay} s')
ups.shutdown_delay = 0
the result log
set ups power shutdown delay to 120s
10499-MainThread 2025-06-15 02:29:53,298 upsPlusHelper.py:100 write_ups DEBUG - write to ups mcu addr 23, reg 24, value 120, length 1
current ups shutdown delay 119 s
10499-MainThread 2025-06-15 02:30:03,414 upsPlusHelper.py:100 write_ups DEBUG - write to ups mcu addr 23, reg 24, value 0, length 1
I'v write a test script to study ups auto shutdown feature.
It write 120 into ups mcu reg 24, then sleep 10s, then read from reg 24, it was 119 instead of 110 , so the unit of shutdown delay seems 10 second, in other words, decrease by 1 every 10s.
my test script
the result log