IAI PSA-24, Instruction Manual

Page: 53 / 84

5.1 Preventive Maintenance Function
5-2
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Status data
The status data that can be monitored is as follows.
Item Content
Output voltage
AD conversion value of output voltage. This power supply fluctuates the
output voltage according to the load, so the output voltage monitor
value changes from time to time, but this is not abnormal.
Voltage of auxiliary
winding
AD conversion value of the control power supply voltage inside the
power supply unit. As with the output voltage, it changes according to
the load on the output voltage side, but this is not abnormal.
Peak hold voltage
Constantly compares output voltage AD conversion value during AD
conversion and saves the maximum current value.
Output current AD conversion value of output current. Represents the instantaneous value.
Peak hold current
Peak value of output current. Constantly compares during AD
conversion and saves the maximum current value.
Load factor
The value obtained by expressing the ratio of the integral value of the
output current used internally for overload judgment and the rated
output current in percentage. If this value exceeds 100%, the output
voltage is cut off as an overload error.
Fan rotation speed
The value obtained by calculating the fan rotation speed based on the
pulse signal input from the fan
PCB temperature
AD conversion value of the temperature sensor in the vicinity of the
output capacitor on the secondary side.
Total power-on time
The power-on time is counted by the CPU and is accumulated
periodically in the internal memory
Fan installation
● Connection recognition
The CPU automatically detects that the fan cable is connected to the power supply circuit
board.
● Rotation speed monitoring
Rotation speed is monitored by counting the pulse signal from the fan. Judgment is as follows.
Item Specifications
Warning
Operation Continues at less than 70% of rated speed for 15 seconds or more
Protection
method
· Alert notification by LED blinking at 1 Hz
(0.5 seconds ON
⇔ 0.5 seconds OFF)
· Alert notification by warning bit during communication
Recovery Automatic recovery
Error
Operation Continues at less than 50% of rated speed for 15 seconds or more
Protection
method
· LED ON
· Switch overload level to 204W (switching operation does not stop)
· Alert notification by error bit during communication
Recovery AC reboot (latch)