45
which the target DIO module is connected. (The service tool may be connected to the EMCP 3 Accessory Data Link service connector.) When connecting to the DIO, the user will first see the Module Summary screen shown in Figure 15.
Figure 15: Caterpillar® Service Tool DIO summary screen
The service tool configuration tool, accessed by pressing F5 or clicking the configuration tool icon on the toolbar, contains setpoints for configuring the DIO identification, as well as the inputs and outputs. Figure 16 shows the ECM Identification Parameters list. This list shows the ECM serial number (read-only) of the module that is connected, and allows for configuration of the ECU instance. It is important to match a specific module to a certain ECU Instance. The system will not function properly if ECU instances are duplicated. Upon changing the ECU instance, the Caterpillar service tool will automatically reconnect to the data link, and the DIO module name should reflect the new ECU instance. In this example, the module was previously named “Discrete I/O Module #1”, and after the ECU instance is changed to 2 and the service tool reconnects, the name reads “Discrete I/O Module #2” (Figure 17). Configuring Digital Inputs The Discrete Input #1 Configuration list of the service tool configuration tool is shown in Figure 18. All twelve discrete inputs have identical parameters and options. The active state configuration determines which state (high or low) triggers the event, and depends on the sensor/switch wiring configuration.
