4 Safety Function Blocks
4 - 42
NX-series Safety Control Unit Instructions Reference Manual (Z931)
SF_ESPE
This safety FB monitors electro-sensitive protective equipment (ESPE). ESPE includes light curtains,
laser scanners, etc.
Instruction Name FB/FUN Graphic expression
SF_ESPE Electro-Sensitive
Protective Equip-
ment (ESPE)
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_ESPE_In SAFEBOOL TRUE or FALSE FALSE A variable. This is a safety request input.
FALSE: There is a request for a safety function.
TRUE: There is no request for a safety function.
If the ESPE is used as a stopping device, the safety con-
trol system must detect a short shutoff (80 ms min.
according to IEC 61496-1) with a sensor.
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_ESPE_Out SAFEBOOL TRUE or FALSE FALSE The safety function enable signal.
FALSE: Disables the safety output. There is a request for a
safety-related response (example: a reset request or an
internal error).
TRUE: Enables the safety output. There is no request for a
safety-related response.
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_ESPE
Activate
S_ESPE_In
S_StartReset
BOOL
SAFEBOOL
BOOL
WORD
Ready
S_ESPE_Out
Error
DiagCode
BOOL
SAFEBOOL
SAFEBOOL
SAFEBOOL S_AutoReset
BOOL Reset
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