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PART 2: CX-Server PLC Tools
OMRON
CHAPTER 3 – IO Table Component
CX-Server PLC Tools_Page 19
CHAPTER 3
IO Table Component
This chapter describes the IO Table component available to C-series, CV-series, CS/CJ series PLCs and its ability
to create, retrieve and edit a configured PLC’s rack and address data.
The IO Table component allows configuration of racks, slots and units within a PLC, using available hardware as
reference. Within a PLC there are three versions of an IO Table, all of which should ideally have the same
contents. IO Table component editing allows manipulation of the internal version of the table, and modification of
the PLC’s view of how the hardware is configured. The three versions are:
♦
Actual IO Table
. The real hardware configuration of the PLC units and slots on power-up.
♦
Registered IO Table
. The internal PLC table: this is the one used by the PLC when running, regardless of the
state of the actual hardware. It can be read and, for C2000 PLCs, CV-series PLCs and CS/CJ series PLCs,
written to by the CX-Server software.
♦
CX-Server IO Table
. The IO configuration understood by CX-Server. It can be created and modified directly,
independently from the PLC, and can be transferred with a program (for CV-series and CS/CJ series PLCs).
The Registered Table and CX-Server’s table can be changed from the PC, but the actual configuration requires the
physical manipulation of the PLC hardware. It is only possible to transfer the Registered IO Table in C2000, CV
and CS/CJ series PLCs to the PLC. Editing of individual IO units in the Registered IO Table is only available in
C1000H, C2000H, CS/CJ series and CV-series PLCs.
The IO Table component is displayed as a hierarchical structure. The IO Table view can be expanded to show
entries for all Remote Terminals (RTs) and the IO. All possible racks and unit numbers for the active PLC are
displayed although these may not all be in use. An address and IO string are displayed against each rack slot or
unit; this is used to indicate the input and output characteristics of the unit.
The status bar displays the selected PLC and CPU type, and the current operating mode of the PLC.
When a Remote Terminal (RT) is added, it can be expanded to provide the Terminals view, showing entries for all
slots on that remote rack.
Icons to the left of a rack indicate units fitted to expansion racks, SYSBUS/SYSBUS2 remote racks or IO
Terminals. To view the content of the IO Table, double-click on a rack. The unit address is displayed in brackets
for each slot.
For CV-series PLCs, SIOU units are shown on the IO Table tree as a separate rack. For CS/CJ series PLCs, SIOU
units are all integrated into the main rack.
Whilst in online mode operations can be selected that affect the PLC, for instance creating an IO Table. These
options are only available when the PLC is in the correct mode of operation for programming.
The IO Table component can be forced to be displayed in focus by selecting
Always on top
from the
Options
menu.
For moving, resizing, maximising, minimising and closing windows, refer to Microsoft Windows online help for
further information.
Access to the IO Table component is from the invoking application or via the CX-Net Network Configuration
Tool. Refer to
Chapter 8 - CX-Net Network Configuration Tool
for further details.
To close the IO Table dialog, select the
Close
button in the title bar.
I/O Table Window Variations
CX-Programmer Versions 6.0 and later have the following two kinds of I/O Table Windows.
1, 2, 3…
1. I/O Table Window for the CS/CJ/CP Series (known as the CS/CJ/CP I/O Table Window)
2. I/O Table Window for the C Series and CVM1/CV Series (known as the C/CV I/O Table
Window)
Auto-selection of the I/O Table Window
The following table shows which I/O Table Window will be selected automatically, based on the PLC model and
computer operating system.
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