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Manual 26185
TecJet 110 Fuel Metering System
Woodward
21
Cannot Claim Address
The Cannot Claim Address message will be sent out if the TecJet 50 Plus
receives an Address Claimed message with the same Source Address as the
receiving node and with a higher priority (lower value) NAME. The entire 8-byte
value of the NAME is used for arbitration with the Arbitrary Address Capable
Field as the Most Significant Bit.
The Cannot Claim Address will also be sent out in response to a Request for
Address Claimed if the address was unsuccessfully claimed.
The Cannot Claim Address message will be sent out with a 0-153 millisecond
pseudo-random delay between the reception of the triggering message and the
transmission of the Cannot Claim Address message.
If the TecJet 50 Plus cannot claim an Address a status bit will be set and the
valve will shut down.
TecJet 50 Plus NAME
Arbitrary Address Capable Field = No = 0
(See J1939-81 Section 4.1.1.2)
Industry Group Field = Global = 0
(See J1939 Section 3.2.4, J1939-81 Section 4.1.1.3)
Vehicle System Instance Field = First Instance = 0
(See J1939-81 Section 4.1.1.4)
Vehicle System Field = Non-specific system = 0
(See J1939-81 Section 4.1.1.5)
Function Field = Fuel System = 15
(See J1939-81 Section 4.1.1.7)
Function Instance Field = First = 0
(See J1939-81 Section 4.1.1.8)
ECU Instance Field = 1, 2, 3, 4 corresponding to Address 18, 125, 126, 127
respectively
(See J1939-81 Section 4.1.1.9)
Manufacturer Code Field = Woodward Governor Industrial Controls = 153
(See J1939-81 Section 4.1.1.10)
Position Hold Feature
This feature should only be used by qualified engine operators. This
feature will hold the valve at the desired position regardless of the
fuel demand from the engine controller, which could result in
unexpected engine operation.
The TecJet 110, 50 Plus, and Precision Flow devices have a position hold
feature for use in analyzing or troubleshooting engine system operation. This
allows qualified operators to bypass the normal flow control function and specify
a fixed valve position. This mode is accessed in the Service Tool using the Tools
Æ
Position Hold menu which can only be accessed with a password supplied by
Woodward.
The current valve position is displayed in the Position Hold dialog box. The valve
remains in flow control mode while the Enable Position Hold check-box is
unchecked. After the desired position is entered in the Position Hold Setting,
checking the Enable Position Hold check-box causes the valve to operate in
position hold mode where the valve position is controlled at the Position Hold
Setting value. Un-checking the Enable Position Hold check-box restores normal
flow control operation. Pressing OK closes the Position Hold window without
changing the position hold settings. Position Hold is automatically disabled after
10 minutes. It is also disabled if the service tool connection is lost for more than
10 seconds.
Содержание TecJet 110
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