Q: How much data can PHD hold?A: Uniformance PHD has an extremely flexible storage and retrieval mechanism that is limited only by the power of the user’s computer and operating system. PHD supports millions of tags, stored for an unlimited number of years. Efficient storage and retrieval is achieved through the use of advanced data compression techniques.
Q: Can non-Honeywell control systems be connected to PHD?A: Honeywell provides an extensive library of Real-time Data Interfaces, also known as RDIs. RDIs are available for connectivity to Honeywell, OPC, and third-party data providers. Honeywell services are available to build RDIs to new data sources.
Q: Can PHD collect data through a firewall?A: PHD can collect data through a firewall. In cases where high security policies are implemented at the firewall, it may be optimal to install two PHD servers, one on each side of the firewall, to minimize the number of ports opened.
Q: Can PHD protect from hardware outages?A: The shadow architecture allows data collectors to buffer history data in case of loss of the centralized PHD server. In cases where maximum availability is required, two data collector PCs may be configured in Robust Data Collection mode, providing fail-over to the standby collector node. If high availability is needed at the central “shadow” server, clustering provides protection from server failures.
Q: Does Robust Data Collection create extra load on the control system?A: No. RDC was design to ensure maximum reliability without adversely impacting the underlying data system. The secondary RDC server monitors the primary’s status, and will only begin collecting data upon loss of the primary.
Q: What versions of Microsoft and other software are compatible with PHD?A: Each new version of Uniformance introduces support for latest technologies. The current version, release 300, supports the following:
Q: How many servers are required to run PHD?A: The number of servers depends on the size and complexity of the system. In the case of smaller systems, only one server is required. In cases where communication through a secured firewall is needed, a PHD server on either side of the firewall is recommended. It may also be desirable to distribute shadowed components across multiple computers when the business is physically distributed across many geographic sites.
Q: Does Uniformance System Monitor work with any computer, or just PHD servers?A: USM provides monitoring of any Windows PC, including PHD servers. When run on a stand-alone PC, USM can monitor server health, such as disk use and memory. When run on a PHD server, USM also is able to monitor the internals of PHD, such as interface state, system limits, and data refresh.