Publication 1766-RM001A-EN-P - October 2008
Communications Instructions
455
Enter in the IP address of the 1756 ENET module, select ControlLogix
backplane, press the Insert key and enter in the backplane slot numbers
of the DHRIO module (0-16) under the 'To Address' fields. Click on the
ControlLogix backplane to highlight it and press the Insert key on your
computer’s keyboard to add another hop. Double click on the From
Device under the ControlLogix backplane and select the 1756-DHRIO.
Make sure that the From Port for the DHRIO module is set for Channel B.
Enter in the destination Link ID (DH+ address of target processor) under
the To Address. Press the Insert key to add another hop. Double click on
the From Device and select Remote(DH/DH+/DH-485). Enter in the
destination node address (DH+ octal address of target processor) under
the To Address.
Note: Make sure that the Target Device Data Table Address exists in the
target device.
Network Message Example 3:
MicroLogix 1400 Unsolicited Write Message to RSLinx via Ethernet
Initiating an unsolicited write MSG to RSLinx via EtherNet/IP requires
sending a remote format message that includes Source Link ID and
address, as well as Destination Link ID and address.
The MicroLogix 1400 can send remote ethernet messages using EtherNet/
IP messages. The local version of EtherNet/IP messages use the 0x4B
Execute PCCC service code, whereas the remote version needs to use the
0x4C Execute DH+ service code.
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