Omron ETHERNET DIRECT DR 170 14 - Manual (Page 56)

Klinkmann Automation Omron Ethernet DAServer 54
Omron Ethernet DAServer Ver 1.x User Manual Rev 1.4 17014m14
YourOPCAccessPath is the assembly of hierarchy node names leading to a specific
controller device.
$SYS$Status is the discrete item used to monitor the status of connectivity with the
controller device.
Note: In the case of a PLC disconnect, the DAServer will retry three times before entering
into slow poll mode. In the case of reply time-out, the DAServer will go into slow poll
mode immediately.
Monitoring the Status of DAS Conversations
The InTouch WindowViewer supports built-in topic names, called DDEStatus and
IOStatus, that can be used to monitor the status of specific DAS conversations.
For example, let us assume that WindowViewer (VIEW) is communicating with the
Omron Ethernet DAServer to a PLC that has been defined in the DAServer with the topic
name OmronPLC. The discrete items, DDEStatus and IOStatus, are set to:
• 0 (zero) when this DAS conversation failed.
• 1 (one) when this DAS conversation is successful.
Using DDEStatus and IOStatus in Excel
The status of communications between the PLC and InTouch can be read into Excel by
entering the following DDE reference formula in a cell on a spreadsheet:
=view|DDEStatus!OmronPLC
or
=view|IOStatus!OmronPLC
where:
view is the name of the InTouch application.
[DDE][IO] Status is the built-in topic name used to monitor the status of communications
between the DAServer and InTouch.
OmronPLC is the exact topic name defined in the server for the PLC.
Reading Values from the DAServer into Excel
Values may be read directly into Excel spreadsheets from the DAServer by entering a
DDE formula into a cell using the following format:
=applicationname|<devicegroup>!itemname
Example formula:
=DASOmronEth|OmronPLC!'d100'
where:
DASOmronEth is the name of the DAServer application.
OmronPLC is the exact device group name defined in the DAServer for the PLC.
D100 is the actual location in the PLC that contains the data value. This is the item name.