5.5 Validating the HWBB Function5-155 Safety Functions5.5 Validating the HWBB FunctionWhen you commission the system or perform maintenance or SERVOPACK replacement, youmust always perform the following validation test on the HWBB function after completing thewiring. (It is recommended that you keep the confirmation results as a record.)• When the /HWBB1 and /HWBB2 signals turn OFF, confirm that the Digital Operator displaysHbb and that the Servomotors do not operate for axis A and axis B.• Monitor the ON/OFF status of the /HWBB1 and /HWBB2 signals.If the ON/OFF status of the signals do not coincide with the display, the following must beconsidered: an error in the external device, disconnection of the external wiring, short-circuit-ing in the external wiring, or a failure in the SERVOPACK. Find the cause and correct theproblem.Refer to the following manual for your SERVOPACK for details on the monitor.Σ-7-Series Σ-7W SERVOPACK with MECHATROLINK-III Communications References Product Manual (ManualNo.: SIEP S800001 29)Σ-7-Series Σ-7C SERVOPACK Product Manual (Manual No.: SIEP S800002 04)• Confirm that the EDM1 signal is OFF while in normal operation by using the feedback circuitinput display of the connected device.