EMCP3 Caterpillar

Digital Input Programming

Usage:

There are two separate procedures that must be performed in order to program the EMCP 3 digital inputs. The first procedure involves programming the active state of the input as either "Active High" or as "Active Low". The second procedure involves programming the event input functions.

Digital Inputs

The main purpose for the digital inputs is to add additional monitoring capabilities for the engine or the generator. The inputs can be configured by navigating to the "EVENT I/P FUNCTIONS" parameter under the "SETPOINTS" menu.

Note: There are eight digital inputs on EMCP 3.2 and EMCP 3.3. There are six digital inputs on EMCP 3.1. On all three levels of controls, the first and second digital inputs are dedicated and cannot be programmed.

The digital inputs of the EMCP 3 are tied to an internal pull-up resistor inside the control. Therefore, if there is no connection to a digital input, then the digital input will read as a logical high. A ground or battery negative input should be wired to each EMCP 3 digital input. If an active high configuration is desired, then the ground or battery negative input should be wired through a normally closed switch. If an Active Low configuration is desired, then the ground or battery negative input should be wired through a normally open switch.

Digital input #1 is dedicated for Emergency Stop and digital input #2 is dedicated for Remote Initiate. The other four or six inputs can be configured to trigger alarms or shutdowns in the EMCP 3. In the EMCP 3 software, digital inputs 3 through 8 are linked to functions that are called "EVENT INPUT FUNCTIONS". In the EMCP 3.1 software, digital inputs 3 through 6 are linked to functions that are called "EVENT INPUT FUNCTIONS". Digital inputs #1 and #2 are dedicated inputs. Therefore, digital input #3 is linked to event input function #1, digital input #4 is linked to event input function #2, and so on. Refer to Illustration 1.

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Illustration 1	g01228372

Digital Input #1 - Digital input #1 is used for "Emergency Stop". The input must be wired to battery negative through an emergency stop switch. The input can be set to activate on an active high (normally closed contact) or an active low (normally open contact). If the operator wants to enable the "Reduced Power Mode", then the emergency stop must be configured for active low.

Reference: Testing and Adjusting , "Electronic Control Module (Generator Set) - Configure"

Activating the emergency stop input will either cause the generator set to stop immediately or will prevent the generator set from starting. Once digital input #1 goes active, the engine will not start until the event is reset.

Reference: System Operation , "Event Resetting"

Digital Input #2 - Digital input #2 is used for remotely starting and stopping the generator set. The input must be wired to battery negative through a "Remote Initiate" switch. The input can be set to activate on an active high (normally closed contact) or an active low (normally open contact). If the input is active, and the EMCP 3 is in the "AUTO" mode, then the engine will attempt to start and run. Once the input becomes inactive, the engine will enter into cool down (if programmed to do so) and will then stop.

All remaining inputs can be configured.

Function and Navigation Keys

Reference: Call outs that are used in this section can be found on the EMCP 3 control panel in Systems Operation, "Electronic Control Module (Generator Set)".

The keys listed below are used for programming the EMCP 3 and navigating within the menu structure.

Reference: Refer to Systems Operation, "Electronic Control Module (Generator Set)" for an explanation of the function keys and the navigation keys. The function keys include the enter and escape keys. The navigation keys include the scroll left, scroll right, scroll up, and scroll down) keys.

Escape (9) - Used to navigate up (backward) through the menu structure and to back out of data entry screens during set point programming.

Enter key (10) - Select a highlighted menu item or save a programmed value.

Scroll Right key (11) - During numeric data entry, choose the digit to edit. During certain set point adjustments, select or deselect a check box.

Scroll Down key (12) - Move down through the main menu or navigate within a list in order to highlight one of the items. Also used to decrement digits (0-9).

Scroll Up key (13) - Move up through the main menu or navigate within a list in order to highlight one of the items. Also used to increment digits (0-9).

Scroll Left key (14) - During numeric data entry, choose the digit to edit. During certain set point adjustments, select or deselect a check box.

Programming the Active State of the Digital Input

Reference: For an example of programming a digital input for a fuel level switch, see Systems Operation, "Setpoint Programming".

In order to program the "Active State" of the digital input, perform the following steps:

On the EMCP 3, navigate to the digital inputs menu as follows.
1. At the "MAIN MENU" use the arrow keys and enter key to select "CONFIGURE".
2. Use the arrow keys and enter key to select "SETPOINTS".
3. Use the arrow keys and enter key to select "I/O".
4. Use the arrow keys to select "DIGITAL INPUTS".
Using the navigation keys, select the digital input that is to be programmed and press the enter key. The current configuration will be displayed.
Press the enter key a second time. The current configuration will be highlighted.
Use the navigation keys in order to change the current configuration to the desired setting.
Press the enter key in order to save the setting.

Programming the Event Input Functions

Note: Each event input function corresponds to a specific digital input. The event input function #1 corresponds to digital input #3. The event input function #2 corresponds to digital input #4 and so on. Refer to Illustration 1.

Note: The possibility exists to set the event input function to a value for which no event response configuration exists. Examples of such events are high oil pressure warning or high oil pressure shutdown. If the event is made active and the event does occur, then no events will be triggered since no event response configuration exists.

Perform the following steps in order to navigate to the EVENT I/P FUNCTIONS menu to program the "Event Input" functions.
1. At the "MAIN MENU" use the arrow keys and enter key to select "CONFIGURE".
2. Use the arrow keys and enter key to select "SETPOINTS".
3. Use the arrow keys and enter key to select "EVENTS".
4. Use the arrow keys and enter key to select "EVENT I/P FUNCTIONS".
Use the arrow keys and enter key to set the "Active State". The active state should always be set to active "HIGH".
Use the arrow keys and enter key to set the "Time Delay". Press the enter key to select "Time Delay" and enter the desired value using the navigation keys.

Set the "Suspect Parameter Number" (SPN). Press the enter key in order to choose the SPN. The available parameters are listed in Table 1.

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Table 1
Available Parameters
Pressures
Air Filter Differential Pressure Engine Oil Pressure Fire Extinguisher Pressure Fuel Filter Differential Pressure Oil Filter Differential Pressure Starting Air Pressure Gas Pressure
Temperatures
Ambient Air Temperature Engine Coolant Temperature Engine Oil Temperature Exhaust Temperature Rear Bearing Temperature Right Exhaust Temperature Left Exhaust Temperature Generator Winding 1 Temperature Generator Winding 2 Temperature Generator Winding 3 Temperature
Levels
Engine Coolant Level Engine Oil Level Fuel Level External Tank Fuel Level
Other
Air Damper Closed ATS in Normal Position ATS in Emergency Position Battery Charger Failure Battery Charging System Voltage Battery Voltage Fuel Leak Detected Custom Event Earth Fault Earth Leakage Generator Frequency Generator Voltage Generator Current Generator Power Generator Circuit Breaker Closed Utility Breaker Closed Generator Circuit Breaker Open Utility Breaker Open Loss of Utility Utility to Generator Transfer Failure Generator to Utility Transfer Failure Engine Inlet Manifold Charge Combustion EPS Supplying Load Custom Event⁽¹⁾

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⁽¹⁾	For the Input Function setpoint value name "Custom Event", the corresponding setpoint value will be dictated by the information in Table 2.

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Table 2
Custom Event Set Point Value for Event Input Functions cVue Block
Block Instance	Set Point Value	Description
1	701	Custom Event (Instance 1 only)
2	702	Custom Event (Instance 2 only)
3	703	Custom Event (Instance 3 only)
4	704	Custom Event (Instance 4 only)
5	705	Custom Event (Instance 5 only)
6	706	Custom Event (Instance 6 only)
7	707	Custom Event (Instance 7 only)
8	708	Custom Event (Instance 8 only)

Set the "Failure Mode Identifier" (FMI). The following identifiers are available:
- High warning (example: High Temperature Warning)
- Low warning (example: Low Temperature Warning)
- High shutdown
- Low shutdown
- Status (Condition Exists)