ROD AS 2302516 - Caterpillar

Pulse Width Modulation (PWM) Outputs - General Information
The EMCP 4.3 and EMCP 4.4 support two isolated analog PWM output channels. Each channel supports a 2-wire conductor with a shield.The range for the PWM outputs can be configured for 0 to 100% or 5 to 95%. The data range can be configured. The data range must be set to the generator voltage. The output signal is approximately 6V peak.Each PWM output contains a parameter that is called "Data Identifications". Any PWM output can be configured for use with any of the data identifications that are listed in Table 1.
Table 1
Valid Data Identifications
GOV DESIRED ENG SPEED GEN AVG L-N VOLTAGE
AVR DESIRED VOLTAGE GEN AVG L-L VOLTAGE
GEN REAL POWER AVG PHASE CURRENT
GEN REACTIVE POWER ENGINE SPEED
GEN APPARENT POWER ENGINE COOLANT TEMP
GEN PF UREA LEVEL
ENG OIL TEMP CUSTOM PARAMETER #1
GEN FREQUENCY CUSTOM PARAMETER #2
GEN CURRENT PHASE A CUSTOM PARAMETER #3
GEN CURRENT PHASE B CUSTOM PARAMETER #4 (4.4 only)
GEN CURRENT PHASE C GEN WINDING TEMP PHASE A
GEN L-N VOLT PHASE A GEN WINDING TEMP PHASE B
GEN L-N VOLT PHASE B GEN WINDING TEMP PHASE C
GEN L-N VOLT PHASE C GEN FRT BEARING TEMP
GEN L-L VOLT PHASE A-B GEN REAR BEARING TEMP
GEN L-L VOLT PHASE B-C OUTPUT FROM SCADA
GEN L-L VOLT PHASE C-A ENGINE FUEL LEVEL Viewing Current PWM Output Status
Use the following steps to view the status of a PWM output.
Use the navigation keys to highlight "VIEW" at the main menu screen. Refer to Illustration 1.
Illustration 1 g02266893
Press the "OK" key.
Use the navigation keys to highlight "I/O STATUS" at the view screen. Refer to Illustration 2.
Illustration 2 g02266895
Press the "OK" key.
Use the navigation keys to highlight "PWM OUTPUTS" at the I/O status screen. Refer to Illustration 3.
Illustration 3 g02266897
Press the "OK" key.
Refer to Illustration 4. The status of all PWM outputs is displayed. A "dash" under an output number indicates the output is programmed, but is inactive. A large "X" under an output number indicates the output is disabled. A number under an output number indicates the output is programmed and is active.
Illustration 4 g02266918
Use the left or right navigation keys to select the PWM output that is to be viewed.
Press the "OK" key.
The usage type, range, min data and max data will be displayed for the selected analog output. Refer to Illustration 5.
Illustration 5 g02267233Programming PWM Outputs Using the Display
Use the following steps to configure a PWM output with the use of the EMCP 4 display.
Use the navigation keys to highlight "CONFIGURE" at the main menu screen. Refer to Illustration 6.
Illustration 6 g02268073
Press the "OK" key.
Use the navigation keys to highlight "INPUTS & OUTPUTS". Refer to Illustration 7. Note: Access to the "INPUTS & OUTPUTS" submenu is accessible from the menu selection "ALL SETPOINTS".
Illustration 7 g02268096
Press the "OK" key.
Use the navigation keys to highlight "PWM OUTPUTS". Refer to Illustration 8.
Illustration 8 g02267038
Press the "OK" key.
Use the navigation keys to highlight the desired PWM output that is to be programmed. Refer to Illustration 9.
Illustration 9 g02268393
Press the "OK" key.
Press the "OK" key to highlight the current output type. The output will be