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8 USB automatic recognition (Pr. 551 PU mode operation command source
selection = "9999")
9 Modbus-RTU communication stop bit length selection (Pr. 333, Pr.
334)
• When parity checking is not performed (Pr. 334 RS-485 communication parity check selection = "0"), the stop bit length
can be selected with Pr. 333 RS-485 communication stop bit length.
10 Plug-in option compatibility
(1) FR-A7AZ
The motor temperature detection signal (Y55) and the motor temperature monitor output of the plug-in option FR-A7AZ is
supported. For the details of FR-A7AZ, refer to the Instruction Manual of FR-A7AZ.
(2) FR-A7AD
The plug-in option FR-A7AD is supported. The 0V voltage calibration request signal (X83) and the during 0V calibration
signal (Y83) can be used for 0V calibration of the high speed analog output. For the details of FR-A7AD, refer to the
Instruction Manual of FR-A7AD.
(3) FR-A7NCE
For the details of FR-A7NCE, refer to the Instruction Manual of FR-A7NCE.
The communication option FR-A7NCE is supported. The following monitor items are assigned to the remote registers
RWrn+71 and RWrn+72. (Refer to page 40 of the Instruction Manual of FR-A7NCE.)
For the details of FR-A7NCE, refer to the Instruction Manual of FR-A7NCE
FR-A701 can automatically recognize the USB connection and switch the command source during PU operation
mode.
Parameter
Number
Name
Initial
Value
Setting
Range
Description
551 *
PU mode operation
command source
selection
9999
1
RS-485 terminals are the command source when PU operation
mode.
2 PU connector is the command source when PU operation mode.
3 USB connector is the command source when PU operation mode.
9999
USB automatic recognition
Normally, the PU connector is the command source. When USB is
connected, the USB connector is the command source.
* This parameter allows its setting to be changed in any operation mode even if "0 (initial value)" is set in Pr. 77 Parameter write selection.
When a communication option is installed, parameter setting is always enabled.
The stop bit length can be selected for the Modbus-RTU communication.
Parameter
number
Name Initial value
Setting
range
Description
333
RS-485 communication
stop bit length
1
0 Stop bit length 1 bit
Valid when
Pr. 334 = "0"
1 Stop bit length 2 bits
10 Stop bit length 1 bit
11 Stop bit length 2 bits
334
RS-485 communication
parity check selection
2
0
Without parity check
Stop bit length according to
1
With odd parity
Stop bit length 1 bit
2
With even parity
Stop bit length 1 bit
Address
Description
Upper 8 bits Lower 8 bits
RWrn+71 Output power (with regenerative display)
RWrn+72 Cumulative regenerative power
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