4 Operation
4-17
4.3.7 SEMI F47 Function (Torque Limit Function for Low DC Power Supply Voltage for Main Circuit)
The torque limit function detects an undervoltage warning and limits the output current if the DC power sup- ply
voltage for the main circuit in the DRIVER drops to a specified value because the power was momentarily
interrupted or the power supply voltage for the main circuit was temporality lowered.
This function complies with SEMI F47 standards for semiconductor production equipment.
Combining this function with the parameter for Instantaneous Power Cut Hold Time allows the servomotor to
continue operating without stopping for an alarm or without recovery work even if the power supply voltage
drops.
• This function is able to cope with instantaneous power interruptions in the voltage and
time ranges stipulated in SEMI F47. An uninterruptible power supply (UPS) is required
as a backup for instantaneous power interruptions that exceed these voltage and time
ranges.
• This function is intended for voltage drops in the main circuit power supply.
• Set the host PC or PLC...etc and DRIVER torque limit so that a torque reference that
exceeds the specified acceleration will not be output when the power supply for the
main circuit is restored.
• Do not limit the torque to values lower than the holding torque for the vertical axis.
• This function limits torque within the range of the DRIVER's capability when the power
is cut. It is not intended for use under all load and operating conditions. Use the actual
machine to set parameters while confirming correct operation.
• Setting the Instantaneous Power Cut Hold Time lengthens the amount of time from
when the power supply is turned OFF until the motor current turns OFF. Send the
SV_OFF command to instantly stop the motor current.
(1) Execution Method
This function can be executed either with the host PC or PLC...etc and the DRIVER or with the DRIVER
only.
－
With the Host PC or PLC...etc and the DRIVER
The host PC or PLC...etc limits the torque in response to an undervoltage warning.
The host PC or PLC...etc removes the torque limit after the undervoltage warning is cleared.
DRIVER
Summary of Contents for LECYU Series
Page 30: ...1 Outline 1 9 1 4 3 Three phase 200 V LECYU2 V9 Models ...
Page 65: ...3 Wiring and Connection 3 11 3 Wiring Example with DC Power Supply Input DRIVER ...
Page 92: ...3 Wiring and Connection 3 38 External Dimensions Units mm 1 FN Type by Schaffner EMC Inc ...
Page 93: ...3 Wiring and Connection 3 39 2 FN Type ...
Page 143: ...4 Operation 4 44 ...
