Hitachi WJ Series

Chapter 14 Safety Function STO
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Chapter 14 Safety Function STO
This chapter describes the safety function STO (Safe Torque Off) defined in the functional safety
IEC61800-5-2.
For further information on functional safety, refer to the separate "WJ Series C1 Safety Function Guide
(NT3612*X)".
For details of the installation, wiring, and the various functions of the inverter, refer to the corresponding
chapters.
When performing each work, carefully read "Chapter 1 Safety Instructions/Risks" and the corresponding
chapters, and pay attention to safety.
14.1 Using the Safety Function STO (Safe Torque Off) .................................................................... 14-1-1
14.1.1 STO Function .......................................................................................................................... 14-1-1
14.1.2 STO State Monitor Output (EDM Signal) ............................................................................ 14-1-3
14.1.3 STO Status Indication ............................................................................................................ 14-1-4
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