HONEYWELL 51410070-176 CC-PAON01 Automation module

This function is configured/enabled by the Environment (ENV) command and executed at power-up (optionally also at reset) or by the RB command assuming there is valid code in the EPROM, PROM, or FLASH devices (or optionally elsewhere on the module or VMEbus) to support it. If ROMboot code is installed, a userwritten routine is given control (if the routine meets the format requirements). One use of ROMboot might be resetting SYSFAIL* on an unintelligent controller module. The NORB command disables the function

For a user's ROMboot module

 to gain control through the ROMboot linkage, four requirements must be met: 1. Power must have just been applied (but the ENV command can change this to also respond to any reset). 2. Your routine must be located within the MVME16X ROM memory map (but the ENV command can change this to any other portion of the onboard memory, or even offboard VMEbus memory). 3. The ASCII string "BOOT" must be located within the specified memory range. 4. Your routine must pass a checksum test, which ensures that this routine was really intended to receive control at powerup. To prepare a module for ROMboot, the Checksum (CS) command must be used. When the module is ready it can be loaded into RAM, and the checksum generated, installed, and verified with the CS command.

When you wish to make use of ROMboot

you do not have to fill a complete memory device. Any partial amount is acceptable, as long as: 1. The identifier string "BOOT" starts on a longword (EPROM and Direct spaces) or 8KB (local RAM and VMEbus spaces) boundary. 2. The ROMboot module size (in bytes) is evenly divisible by 2. 3. The length parameter (offset $8) reflects where the checksum is, and the checksum is correct. ROMboot searches predefined areas of the memory map for possible routines and checks for the "BOOT" indicator. Two events are of interest for any location being tested: 1. The map is searched for the ASCII string "BOOT". 2. If the ASCII string "BOOT" is found, it is still undetermined whether the routine is meant to gain control at power-up or reset. To verify that this is the case, the bytes starting from "BOOT" through the end of the routine, excluding the two byte checksum, are run through the Bug checksum algorithm. If the result of the checksum is equal to the final two bytes of the ROMboot module (the checksum), it is established that the routine was meant to be used for ROMboot.

Application industry

Our main products are widely used in metallurgy, oil and gas, glass manufacturing, aluminum, petrochemical, coal mine, paper making and printing, textile printing and dyeing, machinery, electronic manufacturing, automobile manufacturing, tobacco, plastic machinery, electricity, water conservancy, water treatment/environmental protection, municipal engineering, boiler heating, energy, power transmission and distribution, etc.

 Superior products

We mainly make spare parts for DCS, PLC, robot control system and large servo system.

Main products: various modules/cards, controllers, touch screens, servo drives.

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