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Automation Networks

DH Info Base

Anc: automation network converters and other products to automate processes Through our anc we are able to connect with popular ethernet & fieldbus industrial protocols or networks

Rslinx classic / ignition / kepware opc server with the anc-100e, ethernet to dh+ converter

I have a client who has a system that includes qty 3 of AB SLC 5/04, one Panelview 1000 and a PC connected to one of the SLC 5/04s via DF1 port and doing logging. Client would like to upgrade this system but it controls plant refrigeration and it is not possible to shut it down for any length of time. I am thinking of adding the ANC-100e to get the DH+ onto Ethernet. Then I would replace the data collection PC first by collecting the data to a server via DH+ to Ethernet, then replace the Panelview 1000 with screens on the new PC platform via Ethernet then finally migrate the functionality out of the SLC’s step by step. Once it is done I will just have the new system on Ethernet and no longer require the ANC-100e.


The History of the SLC-500

SLC full name is “Small Logic Controller”. The first SLC, Known simply as an SLC500, was an integrated platform containing the CPU, power supply, and IO all in one package. with 1K of memory and was used in small i/o application


How many Data Highway Plus Nodes can a single ANC-100e communicate with?

The ANC-100e’s Data Highway Plus firmware does not have a specific limit on the number of nodes it can communicate with (beyond the inherent limits of the DH+ protocol itself), however, be aware that DH+ is a serial based token passing protocol, and thus there will be significant delays in update rates for each additional node on the network that may hold the token.


What are common things that prevent reliable DH+ communications on the ANC-100e gateway running the DH+ Bridge FW?

If the NS or NET LED is not solid green then check the recommendations below:

1) For networks running at 57k6 or 115k2 bauds it is necessary to have 150 ohm resistors on each end of the network (for 230k4 use 82 ohm resistors)
2) Ensure that at least 10′ or 3 meters of cable is used between gateway and any surrounding nodes
3) Ensure that the outer braided shield has been grounded in one place to reduce noise

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