EST3 Installation and Service Manual

Power-up and testing

Runtime and system errors

Introduction

There are two major categories of errors which can occur when configuring a database for the network. The System Definition

Utility program is used to set up the contents of each cabinet.

Once all the cabinets have been defined, devices labeled, and rules written, all this information is cross checked against itself.

This process is called compiling the program. If there are incorrectly written rules, unreferenced input or output devices or other problems with the design, the compiler will generate a list of errors. These errors must be corrected using the SDU.

When the data has been properly compiled, the data is in a form that the CPU memory can receive. Sending this information to the memory of the various CPUs making up the network is called downloading. If an error occurs during the download process, it is referred to as a runtime error.

Runtime errors

There are a number of reasons that errors may occur when downloading data into the CPU controllers. Initially, certain

“errors” are to be expected, as the network database is loaded in steps. Until all portions of the database are properly entered into memory, errors will be generated. During initial system configuration, this is to be expected. Most of these errors will resolve themselves as the system configuration progresses.

A second source of download errors is a mismatch between the cabinet configuration in the SDU and the actual hardware installation. The most common cause for this error is typically due to the installation of a local rail module in the wrong rail position. Another common cause is the installation of the wrong type module in the rail. Misidentification of an entire cabinet can also cause this type of error.

A third source of download error can occur after the cabinets have been initially downloaded. After the initial downloads, all subsequent downloads can be done using the network data circuit. The third type of error is primarily caused by communications problems between cabinets.

6.4 EST3 Installation and Service Manual