Omron NXR Series User Manual page 17

IO-Link Communications
• Make sure that the communications distance and method of connection for IO-Link are within speci-
fications.
• Do not exceed the specifications of the connected IO-Link Master Units.
• IO-Link communications are not always established immediately after the power supply is turned
ON. Confirm that the Input Data Enabled for the I/O data in the IO-Link Master Unit is TRUE before
you use the IO-Link process input data. Refer to the NXR-series IO-Link Master Unit for EtherNet/IP
User's Manual (Cat. No. W619) for details on the specifications of Input Data Enabled.
Actual Operation
• Check the user program, data, and parameter settings for proper execution before you use them for
actual operation.
• Take appropriate measures to ensure that the specified power with the rated voltage and frequency
is supplied in places where the power supply is unstable.
Turning OFF the Power Supply
• Always turn OFF the external power supply to the IO-Link I/O Hubs and the power to the devices to
communicate with the Hubs before you connect the communications cables.
• Always turn OFF the external power supply to the IO-Link I/O Hubs before attempting any of the fol-
lowing.
Assembling Units including the connected devices
Connecting or wiring cables
Attaching or removing connectors
Operation
• Confirm that the controlled system will not be adversely affected before you perform any of the fol-
lowing operations.
Changing the operating mode of the CPU Unit (including changing the setting of the Operating
Mode at Startup)
Changing the user program or settings
Changing set values or present values
Forced refreshing
• The CPU Unit refreshes I/O even when the program is stopped (i.e., even in PROGRAM mode).
Confirm safety thoroughly in advance before changing the status of any part of memory allocated to
I/O Units, Special I/O Units, or CPU Bus Units. Any changes to the data allocated to any Unit specif-
ically the Special I/O Units/CPU Bus Units may result in unexpected operation of the loads connect-
ed to the Unit.
Transferring I/O memory data to the CPU Unit with a Programming Device (PC tool).
Changing present values in memory with a Programming Device.
Force-setting/-resetting bits with a Programming Device.
Transferring I/O memory files from a memory card or EM file memory to the CPU Unit.
Transferring I/O memory from a host computer or from another PLC on a network.
NXR-series IO-Link I/O Hub User's Manual (W620)
Precautions for Safe Use
15