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7
PRECAUTIONS
During SSCNET ΙΙΙ communication, the inverter parameter can not be changed from the servo system
controller. Note that, even if the mode has changed to SSCNET ΙΙΙ operation mode, setting "2" in Pr.77
Parameter write selection allows parameter setting change from the PU (FR-DU07/FR-PU07/FR-PU04).
In such case, Pr.CL Parameter clear and ALLC All parameter clear can not be made.
The usable encoder pulses are 1000 to 4096 pulses.
Start and stop commands are given from SSCNET ΙΙΙ side and STF signal and STR signal are made
invalid. Instead, upper stroke limit signal can be assigned to STF terminal and lower stroke limit signal to
STR terminal. (Refer to page 69 for input terminal function validity/invalidity.)
Before starting operation, always give the servo ON signal from the host controller to put the motor in the
servo lock status, and then start operation.
Running speed depends on the command from the servo system controller.
(The rotation direction depends on the setting of Pr. 379 SSCNET III rotation direction selection.)
When "0, 10" (droop control is disabled during acceleration/deceleration) is set in Pr.288 Droop function
activation selection, droop control can not be performed. Set "1, 11" or "2".
(For details, refer to the inverter manual.)
E.OC3 and E.OV3 are displayed when the inverter stops due to "overcurrent shut-off" or "regenerative
overvoltage shut-off" during SSCNET ΙΙΙ operation. (For details, refer to the inverter manual.)
Restrictions of I/O signal (Refer to page 69) are the same even when used with other options (FR-A7AX,
FR-A7AY, FR-A7AR, etc).
Offline auto tuning cannot be performed from the servo system controller. Perform it using the PU or the
setup software (FR Configurator FR-SW3-SETUP-WE) before starting communication.
Before shutting off the communication temporarily by resetting the inverter power, disconnecting the
SSCNET III cable, or other methods, it is necessary to perform the disconnection/reconnection function
for the servo system controller. Refer to "Q173DCPU/Q172DCPU motion controller programming manual
(common mode version)" for details.
When the MRS signal is on, create a motion SFC program that turns on the servo off command of the
target shaft. Before resetting the MRS signal (ON to OFF) or turning off the servo off command, make sure
that the motor speed is 20r/min or less.
74
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