Manual 02879 723PLUS/Analog Load Sharing
Woodward 47
3. USE 5-GAIN MAP should be set TRUE to bring into view the 1st
DYNAMICS- 5 GAIN menu and permit the use of a 5-Gain Curve for setting
the control gain as a function of fuel demand. If Use 2nd Dynamics is also
set TRUE, the 2nd DYNAMICS- 5 GAIN menu will appear and permit the
use of a second 5-Gain Curve. These two curves each provide 5 tunable
gain settings at 5 tunable fuel demand breakpoints. When USE CONST
DYNAMICS is also set FALSE, the 5-gain curve settings are varied by the
ratio of actual engine speed to rated speed (e.g., at 50% speed the gain
setting is also reduced by 50%). Set to FALSE to disable the 5-gain curve
function and conceal the DYNAMICS- 5 GAIN menus.
4. USE CONST DYNAMICS should be set to TRUE to enable constant
dynamics. Set to FALSE to allow variable dynamics which will vary the
speed control gain setting by the ratio of actual engine speed to rated speed
and the reset setting by the ratio of rated speed to actual engine speed.
5. USE EXT FUEL LIMIT should be set to TRUE to bring into view the EXT
FUEL LIMIT CURVE menu and permit the use of the External Fuel Limit.
The External Fuel Limit function provides five tunable limits of the fuel
demand at five tunable external input breakpoints. Normally an air manifold
pressure transmitter is used as the Ext Fuel Limit input device. Set to
FALSE to disable the Ext Fuel Limit function and conceal the EXT FUEL
LIMIT CURVE menu.
6. USE COMM PORTS should be set to TRUE to bring into view the
configuration and service menus for Communication Ports 2 and 3. Set to
FALSE to conceal the Communication Ports 2 and 3 configuration and
service menus.
7. USE REMOTE COMMANDS is set to FALSE to block remote Modbus
Boolean and Analog write commands and enable the discrete and analog
hardware input commands. Set to TRUE to enable Modbus Boolean and
Analog write commands. Modbus Boolean writes can also be used to
enable specific hardware input commands instead of the Modbus
commands.
8. REMOTE LOCK IN LAST is used to hold the last speed reference before
failure when the Remote Speed or Baseload Reference inputs fail. Set to
FALSE to disable REMOTE LOCK IN LAST. Set to TRUE to enable
REMOTE LOCK IN LAST.
9. FORCE DISCRETE OUTPUTS should be set to TRUE to enable manual
control of the discrete outputs and disable automatic control. Set to FALSE
to disable manual control and enable automatic control (default is FALSE).
10. RESET ALM ON CLEAR is set to TRUE to issue an alarm reset whenever
engine speed reaches 5% of rated speed during starting. Set to FALSE to
block this alarm reset function. A FALSE setting does not block other types
of alarm resets.
11. RESET ALM AT CB/RTD is set to TRUE to issue an Alarm reset when the
speed clears 90% speed reference or the CB Aux input is closed for a
tunable delay time. Set to FALSE to block this alarm reset function. A
FALSE setting does not block other types of alarm resets.
12. USE CONT D AS RESET is set to TRUE to make contact “D” an alarm
reset input. See Table 3-1 for Contact D options.
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