-

S_AntivalentOut output

Output signal of the function block (enable signal).

Data type: SAFEBOOL

Following activation of the function block, the value of the output signal depends on the values at the function block inputs S_ChannelNC and S_ChannelNO, and also on whether or not the function block has detected an error.

Hinweis
As the enable signal is present at the S_AntivalentOut output, this output is also referred to as the enable output.

Connection: Connect this output to other safety-related function blocks/functions.

The function block supports a safety-related monitoring function but not a safety-related control function.
 

WARNUNG
Unintended machine operation
  • Verify that the S_AntivalentOut enable signal does not directly control the safety process.
  • Validate the overall safety-related function, including the start-up behavior of the process, and thoroughly test the application.

Hinweis
Permanent signals (S_ChannelNC = SAFETRUE and S_ChannelNO = SAFEFALSE) at the inputs when the function block is activated (Activate = TRUE) or when the Sicherheitssteuerung is started up switch the enable signal (S_AntivalentOut) to SAFETRUE.

ValueDescription
SAFETRUEThe S_AntivalentOut output can only be SAFETRUE if the following conditions are met:

  • The function block has been activated (input Activate = TRUE)
  • and input S_ChannelNC must be SAFETRUE and input S_ChannelNO must be SAFEFALSE
  • and both inputs have switched to this state within the time set at DiscrepancyTime
  • and the function block has not detected an error.
SAFEFALSEThe S_AntivalentOut output is SAFEFALSE if

  • the function block is not activated (input Activate = FALSE)
  • or unless both of the inputs have the corresponding state (S_ChannelNC = SAFETRUE and S_ChannelNO = SAFEFALSE)
  • or the inputs do have the corresponding states (S_ChannelNC = SAFETRUE, S_ChannelNO = SAFEFALSE), but the function block outputs an error message (Error output = TRUE).