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4 Safety Function Blocks
NX-series Safety Control Unit Instructions Reference Manual (Z931)
4
SF
_T
woHand
ControlT
ypeII
• This FB provides a type II, two-hand control function as defined in ISO 13851 (EN 574). If
S_Button1
and
S_Button2
are set to TRUE in the correct order, the
S_TwoHandOut
output is also set to TRUE.
• This FB also controls releasing of both buttons before it sets the
S_TwoHandOut
output to TRUE
again.
Note Transitions to the Idle state from any other state are not shown for when
Activate
changes to FALSE. How-
ever, the transition to the Idle state has the highest priority (0).
Function
State Transition Diagram
1
1
1
1
1
1
1
1
1
1
2
2
2
2
2
3
3
3
Idle
0000
Init
8001
Error
C001 B1
C002 B2
C003 B1&B2
Locked On
8019
Button 1
Actuated
8005
Button 2
Actuated
8006
Buttons
Released
8004
Button 2
Released
8007
Button 1
Released
8008
Locked Off
8009
2
3
2
3
3
0
3
NOT (B1 OR B2)
NOT (B1 OR B2)
NOT (B1 OR B2)
NOT (B1 OR B2)
NOT (B1 OR B2)
NOT (B1 OR B2)
NOT B1 AND B2
NOT B1 AND B2
NOT B1 AND B2
B1
B1
B1
B2
B1 AND B2
B1 AND B2
B1 AND NOT B2
B1 AND NOT B2
B1 AND NOT B2
NOTB1 AND B2
NOTB1 AND B2
NOTB1 AND B2
NOT (B1 OR B2)
NOT (B1 OR B2)
NOT (B1 OR B2)
NOT (B1 OR B2)
NOT (B1 OR B2)
B1 OR B2
B1 AND B2
B1 AND NOT B2
Activate
NOT Activate
B1 AND NOT B2
B1 AND B2
B1 AND B2
B1 AND NOT B2B
1
A
N
D
N
O
T
B
2
B1 AND NOT B2
Ready =FALSE
Ready =TRUE
S_TwoHandOut=TRUE
S_TwoHandOut=FALSE
Buttons
Actuated
8000
1
B2=S_Button2
B1=S_Button1
2
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 ...
Page 269: ......