Release Of Safety State - Hitachi SJ Series Safety Function Manual

Chapter 4

4.7 Release of safety state

4.7.1
Release of STO (SS1/SBC)
Time chart of release of STO state is shown as below. Below
example is as STO function. STO state is released by SS1
signal releasing after SS1 completed or SBC signal releasing
after SBC completed.
■
Timing chart
e.g. [1-12]STO-A Release Mode = 00(Without release):
Input
STO-A
Outp
STO-A
monitoring
STO-A
e.g. [1-12]STO-A Release Mode =01(With safety signal):
Input
STO-A
Outpu
STO-A
t
monitoring
STO-A
e.g. [1-12]STO-A Release Mode =02(With release signal):
STO-A Input
STO-A monitoring
STO-A completed
With release signal
*) Setting of [1-12]STO-A Release mode is available to
release the signal of '-A'. Setting of [2-12]STO-B Release
mode is available to release the signal of '-B'.
Open
Active (during STO Keep time)
Inactive
Open
Active(during STO Keep time)
Inactive
Open
Active(during STO Keep time)
Inactive
Inactive
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Safety Function
Release
Short
Inactive
Active
Releasable
Short
Inactiv
e
Active
Releasable
Short
Inactiv
e
Active
Active