Mitsubishi Electric F700 Instruction Manual page 203

Special operation and frequency setting
(3) Operation procedure
⋅ Procedure for operation
Operation pattern
Power supply ON
Setting the parameters
Start inverter operation
Constant-speed commercial
power-supply operation
Deceleration (stop)
inverter operation
2)Signal ON/OFF after parameter setting
MRS
Power supply OFF
ON (OFF)
At start
OFF → ON
(inverter)
At constant
speed
ON
(commercial
power supply)
Switched to
inverter for
ON
deceleration
(inverter)
Stop ON
CAUTION
⋅ Connect the control power supply (R1/L11, S1/L21) in front of input side MC1. If the control power supply is connected
behind input side MC1, the commercial power supply-inverter switchover sequence function is not executed.
⋅ The commercial power supply-inverter switchover sequence function is valid only when Pr. 135 = "1" in the external
operation or combined operation mode (PU speed command, external operation command Pr. 79 = "3"). When Pr. 135 = "1"
in the operation mode other than the above, MC1 and MC3 turn on.
⋅ When the MRS and CS signals are on and the STF (STR) signal is off, MC3 is on, but when the motor was coasted to a
stop from commercial power supply operation last time, a start is made after the time set to Pr. 137 has elapsed.
⋅ Inverter operation can be performed when the MRS, STF (STR) and CS signals turn on. In any other case (MRS signal -
ON), commercial power supply operation is performed.
⋅ When the CS signal is turned off, the motor switches to commercial power supply operation. However, when the STF (STR)
signal is turned off, the motor is decelerated to a stop in the inverter operation mode.
⋅ When both MC2 and MC3 are off and either MC2 or MC3 is then turned on, there is a waiting time set in Pr. 136.
⋅ If commercial power supply-inverter switchover sequence is made valid (Pr. 135 = "1"), the Pr. 136 and Pr. 137 settings are
ignored in the PU operation mode. The input terminals (STF, CS, MRS, OH) of the inverter return to their normal functions.
⋅ When the commercial power supply-inverter switchover sequence function (Pr. 135 = "1") and PU operation interlock
function (Pr. 79 = "7") are used simultaneously, the MRS signal is shared by the PU operation external interlock signal
unless the X12 signal is assigned. (When the MRS and CS signals turn on, inverter operation is enabled)
⋅ Changing the terminal function using any of Pr. 178 to Pr. 189, 190 to Pr. 196 may affect the other functions. Please make
setting after confirming the function of each terminal.
♦ Parameters referred to ♦
Pr. 11 DC injection brake operation time
Pr. 57 Restart coasting time
Pr. 58 Restart cushion time
Pr. 79 Operation mode selection
Pr. 178 to Pr. 189 (Input terminal function selection)
Pr. 190 to Pr. 196 (Output terminal function selection)
196
⋅ Pr. 135 = "1" (open collector output terminal of inverter)
⋅ Pr. 136 = "2.0s"
⋅ Pr. 137 = "1.0s" (Set the time longer than the time from
⋅ Pr. 57 = "0.5s"
⋅ Pr. 58 = "0.5s" (Be sure to set this parameter when
CS STF
OFF OFF
(OFF) (OFF)
OFF → ON OFF → ON
→
ON OFF ON
OFF → ON
ON
ON → OFF
ON
Refer to page 81
Refer to page 109
Refer to page 109
Refer to page 142
Refer to page 85
Refer to page 91
when MC3 actually turns on until the inverter and motor
are connected. If the time is short, a restart may not
function properly.)
commercial power supply operation is switched to inverter
operation.)
MC1 MC2
OFF → ON
OFF
(OFF → ON)
(OFF)
ON OFF
OFF → ON
ON
→
ON
ON OFF
ON OFF
MC3 Remarks
External operation
OFF → ON
mode
(OFF → ON)
(PU operation mode)
ON
MC2 turns on after
MC3 turns off
ON → OFF
(coasting status during
this period)
Waiting time 2s
MC3 turns on after
MC2 turns off
OFF → ON
(coasting status during
this period)
Waiting time 4s
ON