Omron NX Series User Manual page 54

1 Introduction to IO-Link Systems
l Controller Communications with NX Bus
The following shows the data access methods of each device for controller communications with
the NX bus.
Device Data type
(a) Controller Allocated memory
(b) IO-Link
*1
I/O data
Master Unit
Parameters
Status and software
switches other than for
I/O data
Event log in the IO-Link
Master Unit
(c) IO-Link I/O data
devices
Parameters
Status and software
switches other than for
I/O data
Errors in the IO-Link de-
vice
*1. The allocated I/O data in the IO-Link Master Unit cannot be accessed from the controller with communications instruc-
tions.
*2. Use the NX_WriteObj instruction or NX_ReadObj instruction.
*3. Use the IOL_WriteObj instruction or IOL_ReadObj instruction.
*4. Check the detailed device status of the IO-Link device.
1-22
Communica-
tions methods
Cyclic commu- Specify the I/O port
nications
--- Set the Unit operation settings with Sysmac Studio
Message com- Accessing data with communications instructions from the
munications
*2
controller
Message com-
munications
--- Read the event log with the IO-Link Master Unit Configura-
tion Tool
Message com- ---
munications
Cyclic commu- Allocate I/O to the I/O data in the IO-Link Master Unit and
nications then allocate I/O to the same I/O data in the controller.
--- Set with CX-ConfiguratorFDT
Message com- Accessing data with communications instructions from the
munications
*3
controller
Message com-
munications
--- Read errors with CX-ConfiguratorFDT
Message com- Accessing data with communications instructions from the
munications
*3*4
controller
Data access method
CPU Unit
NX/GX-series IO-Link System User's Manual (W570)