Mitsubishi Electric 800 Series Instruction Manual page 314

 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%).
ON/OFF example for positive logic
Pr.655 = 0, 10
Power
OFF
supply
Analog
output
Analog output
clear
Signal condition during a reset
Pr.655 = 0, 1
ON
Reset
Analog
output
∗
∗ When Pr.655 = "1", the signal condition saved in EEPROM
(condition of the last power OFF) is applied.
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 converter unit (FR-CC2-C), assign the instantaneous power failure detection (X11) signal to an input terminal to input
the IPF signal from the FR-CC2-C to the terminal for X11 signal.
Parameters referred to
Pr.54 CA terminal function selection
Pr.158 AM terminal function selection
Pr.290 Monitor negative output selection
Pr.291 Pulse train I/O selection
Inverter
reset time
Pr.655 = 1, 11
(about 1 s)
Power
OFF
supply
Analog
output
Analog Analog
output output
saved held
Pr.655 = 10, 11
ON
Reset
Analog
output
page 284
page 284
page 284
page 284
5. PARAMETERS
5.8 (M) Monitor display and monitor output signal
3
4
5
5
5
6
7
8
9
10
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