This chapter provides detailed information on the safetyfunctions of the SERVOPACK.11.1 Introduction to the Safety Functions . . . . 11-211.1.1 Safety Functions . . . . . . . . . . . . . . . . . . . . . . . . 11-211.1.2 Precautions for Safety Functions . . . . . . . . . . . 11-211.2 Hard Wire Base Block (HWBB) . . . . . . . . . 11-311.2.1 Risk Assessment . . . . . . . . . . . . . . . . . . . . . . . . 11-311.2.2 Hard Wire Base Block (HWBB) State . . . . . . . . . 11-411.2.3 Resetting the HWBB State . . . . . . . . . . . . . . . . 11-511.2.4 Related Commands . . . . . . . . . . . . . . . . . . . . . 11-611.2.5 Detecting Errors in HWBB Signal . . . . . . . . . . . 11-611.2.6 HWBB Input Signal Specifications . . . . . . . . . . 11-611.2.7 Operation without a Host Controller . . . . . . . . . 11-711.2.8 /S-RDY (Servo Ready Output) Signal . . . . . . . . 11-711.2.9 /BK (Brake Output) Signal . . . . . . . . . . . . . . . . . 11-811.2.10 Stopping Methods . . . . . . . . . . . . . . . . . . . . . . 11-811.2.11 ALM (Servo Alarm) Signal . . . . . . . . . . . . . . . . . 11-811.3 EDM1 (External Device Monitor) . . . . . . . . 11-911.3.1 EDM1 Output Signal Specifications . . . . . . . . . 11-911.4 Applications Examples for Safety Functions . 11-1011.4.1 Connection Example . . . . . . . . . . . . . . . . . . . . 11-1011.4.2 Failure Detection Method . . . . . . . . . . . . . . . . 11-1011.4.3 Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11-1111.5 Validating Safety Functions . . . . . . . . . . . 11-1211.6 Connecting a Safety Function Device . . . 11-13Safety Functions11