VALVE (relay) 8D8748 - Caterpillar

VIMS Nomenclature
Data Links
VIMS communicates with other ECMs on the machine and VIMS communicates with systems off the machine through the data-links. The three data links for VIMS are:CAN Data-Link - This three-wire data link allows communication between the VIMS ECM and other machine control systems for the transfer of data.Cat Data-Link - This two-wire data-link allows communication between the VIMS ECM and other machine control systems. This data-link also allows communication with the Cat® Electronic Technician (Cat ET) service tool.RS-232 Data-Link (Service Tool) - This serial three-wire data link allows communication between the VIMS ECM and the service tool (laptop computer).RS-232 Data Link (Broadcast) - This serial three-wire data link allows communication between the VIMS ECM and other off-board systems that are not service tools. The onboard data can be passed from the machine when a radio telemetry system is connected to the port. Data
VIMS uses four types of data. The four types of data are:Sensed - Data is read from the sensors and switches. The sensors and switches communicate with the VIMS ECM.Internal - Data is generated within the VIMS ECM. The date and time are examples of internal data.Communicated - Data is received through the Cat data-link from other machine systems. For example, the engine speed is received through the Cat data-link from the Engine ECM.Calculated - Data mathematically determined by the VIMS ECM. For example, the event duration is calculated and stored in the event list. Note: Multiple events for a single machine condition may occur. VIMS can inform the user if the actual cause of a stored event is due to a faulty component or a true abnormal condition. Feature Variations
The same VIMS operates on various different machines. All of the possible functions of VIMS are not performed on every machine. Configuration software is used to identify the type of VIMS machine. The configuration software also identifies the available functions of VIMS. Diagnostic information is stored for all system events even if the event is not present at the time of troubleshooting. A personal computer (PC) is used as the VIMS service tool. See the VIMS VIMSpc Users Manual, FEB0047 for additional information. Stored Data
The occurrence of certain events and machine conditions are recorded in the onboard memory. The information is organized into seven categories. This information is used to analyze problems with the machine. The information is typically used at a later date by service technicians or management. The categories of information follow: Event List - The event list is a record of stored events that have occurred on the machine. Not all events are stored. The record contains the last 500 events (data or system) that are listed in chronological order. This means that the events are listed in the order of occurrence. The newest events appear at the top of the list. The event list transfers the oldest data into the "event summary list" when the event list exceeds 500 records. The "event summary list" includes the first five occurrences, the