Chapter 1 Safety Precaution/Risk; Contents In This Chapter; Chapter 10 Maintenance - Hitachi SJ Series Safety Function Manual

Chapter 1

Chapter 1 Safety Precaution/Risk

1.1 Contents in this chapter

This chapter describes precautions for using the Safety
function of the P1-FS with SJ-P1 inverter.
Before installation, wiring, operation, maintenance,
inspection, please make sure to read through the P1-FS
Safety Function Guide, the Safety Function Guide and the
User's Guide of the SJ-P1 inverter and all the other
documentations enclosed with the product.
1.2 Safety Precaution
General warning indicates a potentially
hazardous situation that, if not avoided, can
result in serious injury or death, or damage
to the equipment.
This symbol indicates High voltage. It calls to
your attention to items or operations that
could be dangerous to you and other
persons operating this equipment.
1.2.1 Planning
The persons who design, install and perform maintenance
of safety-related system must have sufficient knowledge of
the functional safety.
It is a responsibility of the manufacturer of safety-related
system to perform risk analysis of the overall system and to
apply appropriate measures accordingly.
1.2.2 Consideration
in Designing safety-related system
The P1-FS supports a holding function of STO state after
release of Safety inputs depending on the setting
parameters. Therefore disabling the holding function by
setting parameters, after Safety inputs to the P1-FS are
released, the SJ-P1 inverter becomes available to restart
the motor operation. Please ensure to design a system so
that the above-mentioned behavior does not lead to any
unsafe situation.
Please note that P1-FS is delivered with the STO function
being enabled not to allow initial drive commissioning
without the need of configuring the Safety function first.
1.2.3 Installation
Installation must be performed by the competent
electricians who have sufficient knowledge of the
functional safety.
Ensure to use the P1-FS with the SJ-P1 inverter within the
specified environmental
environment.
1.2.4 Commissioning
The safety system must always be properly commissioned
and verified/validated before it is considered safe.
1.2.5 Maintenance
The STO function does not cut the power supply to the
inverter and the peripheral circuits, and does not provide
any electrical isolation. Before maintenance, please ensure
to separate the system/machine from main power supply
lines and from the other devices which may supply any
voltage (e.g. permanent magnetic motor, device including
capacitors). Additionally, wait more than 15 minutes and
check the charge lamp of the inverter, and then confirm
that the voltage between P and N terminal is lower than
45V before performing maintenance.
A function test must be conducted at least once in a year.
1.2.6 Others
Never modify the products. Any modification immediately
invalidates the conformities to the all applicable norms,
and the product guarantee.
The precaution items provided in User's Guide of the SJ-P1
inverter are not always described in this chapter. Please
ensure to read through and understand the precaution in
the User's Guide before using the SJ-P1.
1-1
Safety Precaution/Risk
1
condition including EMS