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4 Safety Function Blocks
NX-series Safety Control Unit Instructions Reference Manual (Z931)
4
SF
_SafetyR
equest
SF_SafetyRequest
This safety FB makes requests for the safe state and monitors the safety state for an actuator (e.g., a
drive or valve) that has a safety function.
Instruction
Name
FB/FUN
Graphic expression
SF_SafetyRequest Safety
Request
FB
Variables
Input Variables
Variable
Data type
Valid range
Default
Description
Activate
BOOL
TRUE or FALSE
FALSE
Refer to
Safety FB Common Input Variables
S_OpMode
SAFEBOOL TRUE or FALSE
FALSE
A variable. It is a request for the operation mode of the
connected actuator.
FALSE: Requests safe mode.
TRUE: Requests an operation mode (i.e., non-safe state).
S_Acknowledge
SAFEBOOL TRUE or FALSE
FALSE
A variable. It is the response from the connected actuator
(to confirm whether the actuator is in safe mode).
FALSE: Operation mode (i.e., non-safe state).
TRUE: Safe mode.
MonitoringTime
TIME
Depends on data
type.
T#0s
A constant. It inputs the monitoring time from the safe
mode request (i.e., from when
S_OpMode
changed to
FALSE) until the actuator response (i.e., when
S_Acknowledge
changes to TRUE).
Reset
BOOL
TRUE or FALSE
FALSE
Refer to
Safety FB Common Input Variables
Output Variables
Variable
Data type
Valid range
Default
Description
Ready
BOOL
TRUE or FALSE
FALSE
Refer to
Safety FB Common Output Variables
4-4.
S_SafetyActive
SAFEBOOL TRUE or FALSE
FALSE
The actuator operation mode.
FALSE: Non-safe state.
TRUE: Safe mode.
S_SafetyRequest SAFEBOOL TRUE or FALSE
FALSE
The operation mode request to the actuator.
FALSE: Requests safe mode.
TRUE: Requests an operation mode (i.e., non-safe
state).
Error
BOOL
TRUE or FALSE
FALSE
Refer to
Safety FB Common Output Variables
4-4.
SF_SafetyRequest
Activate
S_OpMode
S_Acknowledge
BOOL
SAFEBOOL
SAFEBOOL
BOOL
Ready
S_SafetyActive
S_SafetyRequest
Error
WORD
DiagCode
BOOL
SAFEBOOL
SAFEBOOL
TIME
MonitoringTime
BOOL
Reset
Summary of Contents for NX-SL series
Page 8: ...CONTENTS 6 NX series Safety Control Unit Instructions Reference Manual Z931 ...
Page 28: ...Sections in this Manual 26 NX series Safety Control Unit Instructions Reference Manual Z931 ...
Page 98: ...2 Standard Functions 2 64 NX series Safety Control Unit Instructions Reference Manual Z931 ...
Page 104: ...2 Standard Functions 2 70 NX series Safety Control Unit Instructions Reference Manual Z931 ...
Page 110: ...2 Standard Functions 2 76 NX series Safety Control Unit Instructions Reference Manual Z931 ...
Page 265: ...I 1 I NX series Safety Control Unit Instructions Reference Manual Z931 Index ...
Page 268: ...I 4 NX series Safety Control Unit Instructions Reference Manual Z931 Index ...
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