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4 Safety Function Blocks
NX-series Safety Control Unit Instructions Reference Manual (Z931)
4
SF_EmergencyStop
SF_EmergencyStop
This safety FB monitors the input from an emergency stop button.
Instruction Name FB/FUN Graphic expression
SF_EmergencyStop
Emergency
Stop
FB
Variables
Input Variables
Variable Data type Valid range Default Description
Activate BOOL TRUE or FALSE FALSE Refer to Safety FB Common Input Variables on page 4-2.
S_EStopIn SAFEBOOL TRUE or FALSE FALSE A variable.
This is a safety request input.
FALSE: There is a request for a safety function. (Exam-
ple: An emergency stop button was pressed.)
TRUE: There is no request for a safety function. (Exam-
ple: An emergency stop button was not pressed.)
S_StartReset SAFEBOOL TRUE or FALSE FALSE Refer to Safety FB Common Input Variables on page 4-2.
S_AutoReset SAFEBOOL TRUE or FALSE FALSE Refer to Safety FB Common Input Variables on page 4-2.
Reset BOOL TRUE or FALSE FALSE Refer to Safety FB Common Input Variables on page 4-2.
Output Variables
Variable Data type Valid range Default Description
Ready BOOL TRUE or FALSE FALSE Refer to Safety FB Common Output Variables on page 4-4.
S_EStopOut SAFEBOOL TRUE or FALSE FALSE The safety function enable signal.
FALSE: Disables the safety output. The safety function is
operating. (Example: An emergency stop button was
pressed, there was a reset request, or a valid internal error
occurred.)
TRUE: Enables the safety output. The safety function is
not operating. (Example: An emergency stop button was
not pressed or no valid internal error occurred.)
Error BOOL TRUE or FALSE FALSE Refer to Safety FB Common Output Variables on page 4-4.
DiagCode WORD
Depends on
state code.
16#0000 Refer to Safety FB Common Output Variables on page 4-4.
SF_EmergencyStop
Activate
S_EStopIn
S_StartReset
S_AutoReset
BOOL
SAFEBOOL
BOOL
WORD
Ready
S_EStopOut
Error
DiagCode
BOOL
SAFEBOOL
SAFEBOOL
SAFEBOOL
ResetBOOL
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