Mitsubishi Electric FR-A800, Instruction Manual

Page: 564 / 1042

(M) Monitor display and monitor output signal Parameters
5 - 384
Analog remote output data retention (Pr. 655)
●
When the power supply is reset (including a power failure) while Pr. 655 "Analog remote output
selection" = "0" (initial value) or 10" and, the remote analog output (Pr. 656 to Pr. 659) returns to
its initial value (1000%).
●
When Pr. 655 = "1 or 11", the analog remote output data is saved in EEPROM before the power
supply is turned OFF. This means that the analog value output after power restoration is the same
as before the power supply was turned OFF. However, when Pr. 655 = "1", the data is not saved
during an inverter reset (terminal reset, reset request via communication).
●
When Pr. 655 = "10 or 11", the analog output before the reset is saved even during an inverter reset.
●
When the setting in Pr. 655 is changed, the remote analog output (Pr. 656 to Pr. 659) returns to its
initial value (1000%).
I002636E
Fig. 5-183: Analog remote output data retention
NOTE When Pr. 655 = "1 or 11" (remote analog output data retention at power OFF), take measures such
as connecting R1/L11 with P/+, and S1/L21 with N/- so that the control power is retained (while
power is supplied to R/L1, S/L2 and T/L3). If the control power is not retained, the analog output
after turning ON the power is not guaranteed to work. When connecting the high power factor
converter FR-HC2, assign the instantaneous power failure detection (X11) signal to an input termi-
nal to input the IPF signal from the FR-HC2 to the terminal for X11 signal.
Parameters referred to
Pr. 54 FM/CA terminal function selection => page 5-341
Pr. 158 AM terminal function selection => page 5-341
Pr. 290 Monitor negative output selection => page 5-341
Pr. 291 Pulse train I/O selection => page 5-341
∗
ON/OFF example for positive logic
Pr. 655 = 0, 10 Pr. 655 = 1, 11
Power
supply
Power
supply
Analog
output
Analog
output
Analog output
clear
Analog
output
saved
Analog
output
held
Inverter
reset time
(about 1 s)
OFF
OFF
ON ON
Pr. 655 = 0, 1
Pr. 655 = 10, 11
Reset Reset
Signal condition during a reset
Analog
output
Analog
output
* When Pr. 655 = "1", the signal condition saved in EEPROM
(condition of the last power OFF) is applied.