KFAS: Fanuc CNC Parts, Service, & Repair

         

K Factory Automation Services has large inventory of Fanuc parts in stock and we maintain a full service in-house repair facility.

       

SAFE TORQUE OFF (STO) FUNCTION  Fanuc Manual B-65412EN.
The operator may require to attach or remove the work piece in the machining area while the protection door is open. To ensure this work can be performed safely, it is necessary to place the machine tool in the emergency stop state and cut off the power to the feed axes or a device such as a magnetic contactor can be installed between the servo amplifier and servo motor to cut off the power automatically.
ai-B amplifier supports the STO function in compliance with IEC61800-5-2, making it possible to safely cut off power of servo axes. By inputting two external interception signals (STO-A and STO-B) to the servo amplifier, the PWM signals are turned off in the servo amplifier. The off status of the PWM signals is monitored in the servo amplifier and the status monitor signal (STO-FB) is output. The power to the servo amplifier can be cut off safely by monitoring the STO-A, STO-B, and STO-FB signals. 

STO or Safety Torque Off Function Fanuc

STO signals are available on JX8 connectors of Fanuc A06B-6240 series servo amplifiers.

Consult your machine's electrical wiring diagram for exact setup for your particular machine. 

The following servo amplifiers that support the STO function.
A06B-6240-H101 to H106    Edition B or later
A06B-6240-H109    Edition A or later
A06B-6240-H121 to -H129    Edition A or later
A06B-6240-H201 to -H211    Edition B or later
A06B-6240-H301 to -H308 (*)    Edition B or later
A06B-6240-H321 to -H328    Edition A or later
A06B-6290-H101 to -H105    Edition B or later
A06B-6290-H106 to -H110    Edition A or later
A06B-6290-H121 to -H130    Edition A or later
A06B-6290-H201 to -H209    Edition B or later
A06B-6290-H301 to -H305 (*)    Edition B or later
A06B-6290-H321 to -H325    Edition A or later
(*) The STO function is not available for the N-axis of a 3-axis amplifier.

Fanuc 31iB 0iF Parameter 2436#1, 0= Does not use the STO function. 1= Uses the STO function.

a06b-6240 SW1 setting STO

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