Woodward GECO, Техническое руководство, Страница: 40 / 90

GECO

Stoichiometric Manual 03554
32 Woodward
12.) This screen allows faults to be
configured to activate the alarm or shutdown
relays, or to be inactive. ON status would
activate the alarm relay, SD activates both
alarm and shutdown relays, and OF is
inactive. During open-loop running or
cranking, valve commands are default
values.
13.) The I/O is configured for single- or dual-
bank engines. Valve 2 and EGO2 are for
dual-bank engines only. EGO3 is needed for
catalyst-downstream oxygen sensing, which
is required for adaptive catalyst control. The
catalyst temperature thermocouple inputs are
also activated on this screen.
14.) The engine interface configuration gives
several choices for the engine-running signal
to the control. Usually, the RPM source is set
to G for G-lead input, or MPU for magnetic
pick-up input. The pulses per rev value need
to be correct for this signals to correlate to
true engine speed. If speed signals are not
available, the control can be activated by a
switch signal through the digital input D1.
Hand-Held Programmer Configuration
A hand-held set-up mode is activated by holding down any key when power is
applied. Although it should never be necessary to change this configuration, it
can be initiated accidentally during power-up or when the unit is disconnected
from the GECO circuit board. The first screen displays “Contrast.” The 1 key will
increase, and the 2 key will decrease the LCD display contrast. The 3 key
accepts the current value. The next screen displays “Baud: 9600.” This value
must be at 9600 Baud for proper operation—the GECO control communicates
only at this speed. The last set-up screen displays “DF: 8n.” The data format
must be 8n1 for proper operation.
If the Modbus Baud is set to 19200, then the Hand-Held will not
communicate to the GECO. If you require the Hand-Held terminal and
the Modbus communications simultaneously, then the Modbus Baud
must be set to less than 19200.
Engine Xface Config
RPM_SIGNL
Source:G
P/Rev:6
I/O Configuration
VALV TC EGO1:ON
1:ON up:ON EGO2:OF
2:OF dn:ON EGO3:ON
Valve Configuration
ALARM V1 V2 DEFAULT
CrntH:SD ON Run 45 %
CrntL:OF OF Cnk 35 %