Bit Description
31 Error code
Bit 00, Safety function deactive/active
• Bit 00 = 1, Safety function, fail-safe reaction is active or pending, or warning is active.
• Bit 00 = 1, Normal operation.
Bit 01, Power up self test
• Bit 01 = 1, Safety option is in PUST state.
Bit 02, Safe Torque Off
• Bit 02 = 0, Safe Torque Off is not active.
• Bit 02 = 1, Safe Torque Off is active.
Bit 07
Reserved for future safety functions.
Bit 08
• Bit 08 = 0, Safe output at 24 V.
• Bit 08 = 1, Safe output at 0 V.
Bit 10
• Bit 10 = 0, No operator acknowledgment requested.
• Bit 10 = 1, Operator acknowledgment from fail-safe PLC requested.
Bit 11, Internal Error
• Bit 11 = 0, No internal error is active.
• Bit 11 = 1, An internal error is active.
Bit 12, Reset
• Bit 12 = 0, No safety option reset is required.
• Bit 12 = 1, A safety option reset is required.
Bit 13, Pending fail-safe state
• Bit 13 = 0, No pending fail-safe state.
• Bit 13 = 1, The safety option is in this state at each power-up.
Bit 14, External error
• Bit 14 = 0, No external error is active.
• Bit 14 = 1, An external error is active.
Configuring the Safety Option
Installation Guide | VLT®Safety Option MCB 152
AN327351953089en-000101 / 130R0578| 39
Danfoss A/S © 2020.02
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