YASKAWA SGD7S-****20A Series Product Manual page 406

Safety Functions
This chapter provides detailed information on the safety
functions of the SERVOPACK.
11.1 Introduction to the Safety Functions . . . . 11-2
11.1.1 Safety Functions . . . . . . . . . . . . . . . . . . . . . . . . 11-2
11.1.2 Precautions for Safety Functions . . . . . . . . . . . 11-2
11.2 Hard Wire Base Block (HWBB) . . . . . . . . . 11-3
11.2.1 Risk Assessment . . . . . . . . . . . . . . . . . . . . . . . . 11-4
11.2.2 Hard Wire Base Block (HWBB) State . . . . . . . . . 11-5
11.2.3 Resetting the HWBB State . . . . . . . . . . . . . . . . 11-6
11.2.4 Related Commands . . . . . . . . . . . . . . . . . . . . . 11-7
11.2.5 Detecting Errors in HWBB Signal . . . . . . . . . . . 11-7
11.2.6 HWBB Input Signal Specifications . . . . . . . . . . 11-7
11.2.7 Operation without a Host Controller . . . . . . . . . 11-8
11.2.8 /S-RDY (Servo Ready Output) Signal . . . . . . . . 11-8
11.2.9 /BK (Brake Output) Signal . . . . . . . . . . . . . . . . . 11-9
11.2.10 Stopping Methods . . . . . . . . . . . . . . . . . . . . . . 11-9
11.2.11 ALM (Servo Alarm) Signal . . . . . . . . . . . . . . . . . 11-9
11.3 EDM1 (External Device Monitor) . . . . . . . 11-10
11.3.1 EDM1 Output Signal Specifications . . . . . . . . 11-10
11.4 Applications Examples for Safety Functions . . 11-11
11.4.1 Connection Example . . . . . . . . . . . . . . . . . . . . 11-11
11.4.2 Failure Detection Method . . . . . . . . . . . . . . . . 11-11
11.4.3 Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11-12
11.5 Validating Safety Functions . . . . . . . . . . . 11-13
11.6 Connecting a Safety Function Device . . . 11-14
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