4 Safety Function Blocks
4 - 36
NX-series Safety Control Unit Instructions Reference Manual (Z931)
SF_Equivalent
This safety FB monitors the discrepancy time for two equivalent SAFEBOOL inputs.
Instruction
Name
FB/FUN
Graphic expression
SF_Equivalent
Equivalent
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_ChannelA
SAFEBOOL TRUE or FALSE
FALSE
A variable. It functions as input A for a logic connection.
FALSE: Input A is open.
TRUE: Input A is closed.
S_ChannelB
SAFEBOOL TRUE or FALSE
FALSE
A variable. It functions as input B for a logic connection.
FALSE: Input B is open.
TRUE: Input B is closed.
Discrepancy-
Time
TIME
Depends on data
type.
T#0ms
A constant. It sets the maximum monitoring time for dis-
crepancy between two inputs.
Output Variables
Variable
Data type
Valid range
Default
Description
Ready
BOOL
TRUE or FALSE
FALSE
Refer to
Safety FB Common Output Variables
S_EquivalentOut SAFEBOOL TRUE or FALSE
FALSE
The safety output.
FALSE: At least one of the signals is FALSE or the state
did not change within the monitoring time.
TRUE: The two input signals are active and the state
changed within the monitoring time.
Error
BOOL
TRUE or FALSE
FALSE
Refer to
Safety FB Common Output Variables
DiagCode
WORD
Depends on state
code.
16#0000
Refer to
Safety FB Common Output Variables
SF_Equivalent
Activate
S_ChannelA
S_ChannelB
BOOL
SAFEBOOL
BOOL
WORD
Ready
S_EquivalentOut
Error
DiagCode
BOOL
SAFEBOOL
SAFEBOOL
TIME
DiscrepancyTime
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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