I/O Calibration - Woodward 723PLUS Technical Manual

723PLUS Digital Marine Control Manual 26482
Rack Position Input (Analog Input #3)
The Rack Position input signal is used to indicate a fuel rack position, which
comes from a Heinzmann position transducer. To verify the input, view the Rack
Position input (displayed in volts) in Service mode under header A**DISPLAY 1**
at prompt 07 RACK POS INPUT (1–5 Vdc). Set the RACK POSITION to its 1
Vdc position. Verify the RACK POSITION matches (±1.0%). Set the RACK
POSITION to its 5 Vdc position. Verify the RACK POSITION (1–5 Vdc) matches
(±1.0%). The input will be calibrated later or is calibrated on the Heinzmann
controller, so the accuracy is not critical at this time.
Torque Sharing
Torque sharing is performed over the LON #1 or LON #2 Control LON wiring
(whichever is active). Verify the wiring between the 723PLUS controls for the
LON #1 and LON #2 Control LON lines. Verify the termination jumper is provided
at each end of both the LON #1 and LON #2 networks. The LON #1 and LON #2
line shields must be connected only at one of the 723PLUS controls. The Control
LON torque sharing signals will be tested after the engine is running.

I/O Calibration

In some applications, it may not be possible or practical to achieve 1–5 Vdc full
range for the Torque Sensor, Rack Position Sensor, or Remote Speed Setting
analog inputs. All of these inputs can be calibrated, or scaled, to use almost any
range within the 1 Vdc and 5 Vdc limits. If the input signal falls outside of the 1
Vdc and 5 Vdc limits, proper fault detection cannot be guaranteed.
At this point the engine still has not been started. Do not attempt the start the
engine until instructed to do so during the I/O calibration. All precautions to keep
the engine from starting should remain in place.
Configure and Service Menu Preset
The calibration process starts by going through the applicable configure and
service menus and presetting as many menu items as possible. See Chapter 4
for menu item definitions and details. If a preset is unknown for a menu item,
leave it at its default setting.
Access the configuration headers with the Handheld programmer or the Watch
Window PC interface (see Chapter 4). View the A**CONFIG SPD CONTROL**
configure header. Step through the menu items and adjust the values to match
the critical engine configurations. After completing the configuring of the items
under the CONFIG SPD CONTROL configure header, continue in the same
manner with the other six configure headers (B**CONFIG OPTION**,
C**CONFIG MAJOR ALARMS**, D**CONFIG MINOR ALARMS**,E**ALARM/SD
CONFIGURE**, and F**CFIG COM PORT 2**), enabling/ disabling functions and
setting the tunable values until all items are set as desired. After adjusting all
configuration menu items, save the settings into the control by pressing the
"SAVE" key on the Handheld programmer or save settings using the Watch
Window PC interface (Refer to "help" if you need help). Exit the configuration
headers and reset the control. The 723PLUS control will reboot before returning
to normal operation. Reboot takes about 20 to 30 seconds.
70 Woodward