In the context of PI Systems, "ih" is often the default tag prefix for the PI Interface for HD (Historian Driver) or related Honeywell interfaces, but "IH" is most commonly associated with the database handle for OSIsoft PI Integrators or simply the historic naming convention for Interface Configuration.
Here is a write-up on the PI Interface Configuration Utility (ICU), which is the standard "config tool" used to set up these interfaces. ih config tool
The IH Config Tool is a software utility designed to parse, modify, and generate binary configuration blobs for hardware initialization sequences. It is most commonly used in scenarios where manual scripting of BIOS/Firmware settings is impractical. In the context of PI Systems, "ih" is
Unlike standard BIOS menus, the IH Config Tool exposes every configurable parameter of a target device—including reserved registers, test modes, and performance knobs not typically available to end-users. Validation: It prevents out-of-range values (e.g.
It prepends a custom header to a binary image (e.g., a U-Boot binary, Linux kernel, or ramdisk). This header contains:
IH_TYPE_KERNEL, IH_TYPE_RAMDISK)IH_COMP_GZIP)You might ask, "Why can't I just use a serial terminal or a text file?" The answer lies in complexity. Modern industrial hardware contains thousands of registers. Changing one bit in the wrong place using a hex editor could brick the device.
The IH Config Tool provides: