Omron NX701-1620, User Manual

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4 Installation and Wiring
4 - 2 NX-series CPU Unit Hardware User’s Manual (W535)
4-1 Processing at Power ON and Power
OFF
Precautions for Safe Use
It takes approximately 10 to 20 seconds to enter RUN mode after the power supply is turned
ON. The outputs during this period will behave according to the slave and Unit specifications.
Use the RUN output on the Power Supply Unit, for example, to implement fail-safe circuits so
that external devices do not operate incorrectly.
Once power supply to the Power Supply Unit starts, approximately 10 to 20 seconds elapses before the
CPU Unit enters the operation-ready status. This period is called the
startup status. The startup time
depends on the slave/Unit configuration
*1
, user program, SD Memory Card usage, SD Memory Card
self-diagnosis usage
*2
, etc.
While the CPU Unit is in the startup status, the RUN indicator flashes at a one second interval.
*1. Some EtherCAT slaves can set a maximum standby time of 1 to 200 seconds. For the CPU Unit, however, the
operation-ready status exists as soon as the EtherCAT Master Function Module is functioning, regardless of
the standby time of the EtherCAT slaves. For the EtherCAT Master Function Module, slaves that do not start
within the maximum waiting time are treated as having an error.
*2. This function performs self-diagnosis on the inserted SD Memory Card. This is executed if the self-diagnosis
at startup is enabled in the Operation Settings under Configurations and Setup − Controller Setup in the
Sysmac Studio.
• Do not touch the terminal section while power is ON. Electrical shock may occur.
• Do not disassemble any of the Units. Particularly the Power Supply Units contain parts with
high voltages when power is ON or immediately after power is turned OFF. Electrical shock
may occur. There are also sharp internal parts that may cause injury.
4-1-1 Power ON Operation
Operation until Operation Ready Status
WARNING