4 Safety Function Blocks
4 - 50
NX-series Safety Control Unit Instructions Reference Manual (Z931)
• This FB controls a guard lock. It monitors the guard and lock position. You can use this FB with a
mechanical lock switch.
• The operator requests access to a hazardous area. The guard can be unlocked only when the haz-
ardous area is in a safe state. If the guard is closed, it can be locked. If the guard is closed and
locked, the mechanical device can be started. An open guard or an unlocked guard is detected as a
situation that has a serious impact on safety.
• Activate the
S_StartReset
and
S_AutoReset
inputs only when you can ensure that no hazardous
state will occur as the result of starting the Safety CPU Unit.
Operating Sequence
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_GuardLocked
SAFEBOOL TRUE or FALSE
FALSE
Connect this output to actuator that is the hazard source
inside the guard. The safety output changes to FALSE
when there is a request to unlock the guard.
FALSE: A non-safe state exists.
TRUE: A safe state exists.
S_UnlockGuard
SAFEBOOL TRUE or FALSE
FALSE
The guard unlock signal.
FALSE: Closes the guard.
TRUE: Releases the guard.
Error
BOOL
TRUE or FALSE
FALSE
Refer to
Safety FB Common Output Variables
4-4.
DiagCode
WORD
Depends on state
code.
16#0000
Refer to
Safety FB Common Output Variables
4-4.
Function
1
External
A request is made to place the hazardous area in the safe state. (This is not included in
this FB.)
2
Input
Feedback is given from the relevant hazardous area that it is in the safe state. (Use
S_SafetyActive
.)
3
Input
Operator requests unlocking the guard. (Use
UnlockRequest
.)
4
Output
Opening the guard is enabled. (Use
S_UnlockGuard
.)
5
Input
The guard is unlocked. (Use
S_GuardLock
.)
Opening the guard is enabled (
S_GuardLocked = FALSE
). The operator opens the guard.
6
Input
Monitoring the status of the guard through
S_GuardMonitoring
(signal for closing the guard
again) starts.
7
Input
The operator provides feedback (
Reset
) to start the hazardous area again.
8
Output
The guard is locked (
S_UnlockGuard
).
9
Input
The locking of the guard is confirmed (
S_GuardLock
).
10
Output
The hazardous area is made operational again (
S_GuardLocked
= TRUE).
11
External
Operation in the hazardous area is restarted.
Содержание NX-SL series
Страница 8: ...CONTENTS 6 NX series Safety Control Unit Instructions Reference Manual Z931 ...
Страница 14: ...Terms and Conditions Agreement 12 NX series Safety Control Unit Instructions Reference Manual Z931 ...
Страница 28: ...Sections in this Manual 26 NX series Safety Control Unit Instructions Reference Manual Z931 ...
Страница 98: ...2 Standard Functions 2 64 NX series Safety Control Unit Instructions Reference Manual Z931 ...
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Страница 130: ...3 Safety Standard Function Blocks 3 20 NX series Safety Control Unit Instructions Reference Manual Z931 ...
Страница 265: ...I 1 I NX series Safety Control Unit Instructions Reference Manual Z931 Index ...
Страница 268: ...I 4 NX series Safety Control Unit Instructions Reference Manual Z931 Index ...
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