YASKAWA SIGMA-7 Series User Manual

5.1 Outline
5-2
5.1 Outline
When the operation of axis A and axis B is not synchronized, the frame of the machine may
twist as shown in the below figure, which can damage the machine or impact the quality of
products.
Position Deviation between Axes Overflow Detection detects twisting of the frame of the
machine. To do this, the allowable position deviation between both axes is set in advance, and
an alarm or warning is generated when the allowable position deviation is exceeded.
The position deviation between axes is the difference between the feedback position (APOS) of
axis A and the feedback position (APOS) of axis B.
Axis A Axis B
Maximum
allowable deviation
Issues an alarm if the threshold is exceeded to
prevent problems before they happen!

YASKAWA SIGMA-7 Series Specifications

General

Encoder Resolution	24-bit absolute encoder
Pollution Degree	2
Cooling Method	Natural cooling or forced air cooling
Control Method	Vector control
Communication Protocols	EtherCAT, MECHATROLINK-III
Input Voltage	AC 200 V, AC 400 V
Rated Output	Varies by model
Safety Function	STO (Safe Torque Off), SS1 (Safe Stop 1), SS2 (Safe Stop 2), SLS (Safely Limited Speed), SBC (Safe Brake Control)
Power Supply Voltage	AC 200 V, AC 400 V
Rated Output Current	Varies by model
Protection Functions	Overload, overvoltage, undervoltage, overheat, short circuit
Operating Temperature	0°C to 55°C
Storage Temperature	-20°C to 65°C
Vibration Resistance	5.9 m/s² at 10 Hz to 55 Hz
Ambient Humidity	5% to 95% RH (non-condensing)
Altitude	Up to 1000 m
Installation	Panel mounted