Comments on example program ladder diagram

Klinkmann Automation Omron Ethernet DAServer

To complete the configuration: from the "Ethernet Unit CPU Bus Unit" (or from the "PLC IO Table - NewPLC1") dialog box select "Options" and click "Transfer to PLC".

Example program for sending “unsolicited” data from PLC

The PLC example program presented in Plcprg.cxp project incorporates the SEND(090) instruction for transferring unsolicited data from PLC to the OMRON ETHERNET DAServer (for programming details see SYSMAC CS1 Series CS1W-ETN01 Ethernet Unit OPERATION MANUAL, section 5).

The program transfers 10 words of data from D10 (notation in ladder diagram - D00010) from the PLC to the OMRON ETHERNET Server (into address D500). The computer where Omron Ethernet DAServer is running has the IP Address: 195.2.103.55 and the destination node number is assigned to 55 (37 in hex).

Comments on example program ladder diagram:

(0)Periodically (once per second) the execution condition flag CIO 000000 turns ON. Note: There can be different logic to turn ON execution condition flag in real application.

(1)If the Communication Port Enabled Flag for port 7 is ON, the send execution program will start when the execution condition flag CIO 000000 turns ON. Input CIO 120000 remains ON from the start of SEND execution until completion. Note: The CS1-series CPU Unit’s Communication Port Enabled Flags are allocated the following way - in Word

A202: Bit 0 – is associated with Port 0, Bit 1 – is associated with Port 1, … , Bit 7 – is associated with Port 7. Bit’s status OFF - means execution enabled, ON – means execution disabled.

(2) Control data (D0, D1, … D4) creation

Word	Contents		Meaning
D0000	00 0A		Number of send words = 10
D0001	00	00	Destination network number = 0 (local
			network)
D0002	37	00	Destination node number = 55 (37 hex)
			Destination unit address = 0
D0003	87	05	Response not required
			Communication port No = 7
			Number of retries = 5
D0004	00	64	Response monitor time = 10 s

Ten words with data from D10 from PLC are sent to D500 onwards on the local network, node number 55, unit address 0 (the computer where Omron Ethernet DAServer is running) – to receive all these data the items with addresses D500…D509 can be correspondingly activated for Omron Ethernet DAServer.

Important! With current example program an application will periodically toggle values of areas D500…D509 with values of areas D10…D19. This is because of DAServer time-

Omron Ethernet DAServer Ver 1.x User Manual Rev 1.4

17014m14

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