Error - Hitachi SJ Series Safety Function Manual

Chapter 4
4.4.3
Holding function of STO state
(Not supported as Safety related function)
The SJ-P1 does not support a safety related function to hold
STO state even after the STO inputs to SJ-P1 have been
released.
Therefore when RUN command is input after releasing STO
inputs or when the STO inputs is released with holding
input status, SJ-P1 immediately becomes available to
restart the motor operation.
Considering the above-mentioned behavior, please apply
at least one of the measures below in order to fulfill the
requirement of EN60204-1:
(1) The RUN command is released simultaneously when
the STO inputs are activated and then given when
restart of the inverter is requested intentionally by an
operator of the system.
(2) The system is designed so that the STO inputs to SJ-P1
are released only when restart of the system is
requested intentionally by an operator of the system.
Not supported as Safety related function below.
Using some parameters of SJ-P1, it is possible to select
following operation. (See section 4.7)
(1) It is possible to configure SJ-P1 to trip once the STO
inputs are activated. With this setting, the inverter remains
in an error state and refrains from outputting to a motor
until a reset input (non-safety) is given or the power to SJ-
P1 is cycled.
(2) When only a STO input is activated, SJ-P1 keeps shut off
state until two STO inputs are activated.
4-3
Safety function