CV500CN228 Omron, CV500CN228 Datasheet - Page 13

• Manufacturer Part Number: CV500CN228
• Description: Programmable Logic Controller
• Manufacturer: Omron

Specifications of CV500CN228

• Peak Reflow Compatible (260 C): No
• Leaded Process Compatible: No
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

1-3-2 Direct Connection Function
Setting
Direct Connection is Not
Selected
Direct Connection is Set
The Host Interface Unit reads instructions to switch screens from the PC
memory area and controls the PT. It reads the status of the PT and writes it to the
PC memory area.
The new Direct Connection function has been added to the Host Interface Unit to
enable the reading and writing of PC bit and word data.
The Direct Connection function is described below.
The Direct Connection function is set using the NT-series Support Tool, which is
the name of the software used to create and maintain the display data for the PT
displays, memory table data, and mark data. Refer to the manual listed below for
information on the Support Tool and how it is used, as well as for the system con-
figuration:
NT20M/NT2000M/NT600M Support Tool Operation Manual (V004)
The conventional Host Interface Unit communication protocol is used. De-select
the Direct Connection function to use existing programs.
In this case, communication is with the PC’s DM area. Data in all other areas is
PC program data which must be sent to the DM area in order to be transmitted. In
addition, the number of numeral and character-string memory tables which can
be communicated with the PC is limited.
This manual describes communications using the Host Interface Unit and Direct
Connection. Refer to NT-series Host Interface Units Operation Manual (V003)
for information on communication without using the Direct Connection function.
The new Host Interface Unit Direct Connection protocol is used. Direct Connec-
tion allows direct reading and writing of most bits and words of the PC memory
and allows automatic changing of the display. This new communication format
The PT is able to directly refer to PC bit and word data so that a PT can be con-
nected to a PC without changing the PC program currently running the produc-
tion line.
The bits and words referring to operating status and work instruction informa-
tion and those storing input data can be freely allocated to almost any part of
the PC memory. Bits and words in the PC can be referenced from any memory
table.
The area to control and notify the PT status, including display screens, back-
lighting on a flash control, alarms and buzzers, can be freely allocated to any
part of the PC memory.
Memory table
Touch switch
Screen switch
PT status
PT
PT
Interface
Host
Unit
AR Area
DM Area
Memory
area
PC
PC
Timer/Counter
Area
CIO Area
Section 1-3