Technical Manual for EA350 Analog Pulse Type Servo Driver V101 When the value set by P8-24 ≥ the duration of instantaneous When the value set by P8-24 instantaneous outage outage Caution ☞ 1: For vertical shaft applications, it is not recommended to use this function, as it may result in a fall. (If this function is enabled when a DO terminal is set to BK, reconnection of the control power will cause an alarm) 2: When this function is enabled, it is also recommended to enable the torque limit function upon voltage drop of the main circuit and set a proper value for P8-22. 3: The servo control power holds for about 80ms.
If the control circuit power cannot continue power supply upon instantaneous outage, it will be handled as a general power cutoff, and the P8-24 setting is invalid. The holding time of instantaneous outage may differ with the output of a servo unit. If the servo motor is highly loaded or has an alarm during instantaneous outage, this function is invalid. P8-18 bit2: Power failure detection function (associated with bit 1) bit2=0 and bit1=0: Turn off the power failure detection function, and power failure of the main circuit will no longer be detected.
In case of a vertical shaft application, it is required to turn on the power failure detection function; otherwise the holding brake cannot be immediately closed upon power failure of the main circuit bit2=1: Turn on the power failure detection function. If the instantaneous outage holding function is not enabled at the same time, then an alarm will occur immediately upon power failure of the main circuit. P8-18 bit3: Position judgment reference switching Bit 3 = 0: Command unit-based position judgment The command unit is the unit of 1 pulse input from the upper device (including group P9 multi-segment position). bit3=1:
Encoder unit based position judgment The encoder unit is the unit of 1 pulse fed back from the motor encoder. Encoder unit = command unit Ч electronic gear ratio For example, the default state upon use of a motor with a 17-bit encoder: As the electronic gear ratio =131072/10000, the encoder unit = command unit Ч 131072/10000 Caution ☞ Settings of these four parameters are subject to this function: P1-18 position deviation following warning, P1-20 position deviation following alarm, P1-23 positioning approach width, P1-24 positioning completion width, and d0-10 position deviation. P8-18 bit4: Reverse direction of speed command (speed mode) bit4=0:
In case of a positive speed command, the motor rotates forward (forward direction is defined by P0-01). bit4=1: In case of a negative speed command, the motor rotates forward (forward direction is defined by P0-01). P8-18 bit5: reserved by vendor Parameter functions: P8-19 bit0: Zero servo switch upon activation OFF bit0=0: When activation is set OFF, if P0-09 > P0-17, the motor will enter the zero servo state within the time set by P0.09-P0.17 (see description of P0-08 bit0=1); bit0=1: When the activation is set OFF, even if P0-09 > P0-17, the servo will not enter the zero servo state; when it decelerate to speed zero, the motor enters the free state. P8-19 bit1:
Runaway detection function switch bit1=0: Turn on the runaway detection function; bit1=1: Turn off the runaway detection function. Caution ☞ Runaway detection is used to prevent runaway resulted from possible speed feedforward/feedback upon incorrect UVW connection. It cannot be used when a vertical shaft and the motor may be dragged reversely. 202 P8-19 Function switch 2 Initial value 000B Communication address 0813H Unit - Time of taking effect With immediate effect Setting range 000B~111B Data size 16bit Control mode P S T