Hamilton Sundstrand Company Fuel Metering Valves XVG - Manual (Page 35)

- Write 2 to register 3005. Valve will close and reset.
6. To restore the previous R and K values, write the value of R to register 7518
and the value of K to 7520. In case the old values are forgotten and the new
values have not been saved to the valve, reset the valve by turning power off
then on to restore R and K. The following steps will also reset the valve; care
must be taken, valve will close and reset.
RESET valve routine:
- Write a password to register 3099.
- Write 1 to register 3005. Wait 100 milliseconds.
- Write 2 to register 3005. Valve will close and reset.
10.4 Download Parameters
All setup parameters, tables 15-20, can be written when you have the appropriate
password. New parameters can be downloaded to the XVG/eXVG as follows:
- Setup proper write-access level for the parameters.
- Write the new values to the registers.
- Perform Save Parameters routine.
10.5 Re-Assign Device Address Procedure
Register
Number
XVG/eXVG Parameter Name Description Type
Write
Access
3005 IDM_SETUPCONNECT Setup Mode: 1=Set Valve in Setup State, 2=Exit
Setup and Reset CPU
U16 W1
3033 IDM_CALFLAGS Calibration Flags U16 W1
3099 IDM_TESTSTR Test string, used for Modbus write access
password.
U16 W0
3540 IDM_SLAVEADDR Modbus slave address. Range: 1 to 247 U16 W2
Table 26: Parameters Used to Assign Device Address
XVG/eXVG default Modbus address is 1. In case the Modbus address is forgotten,
a new address can be assigned by using broadcast messages. Perform the following
steps; send all messages with device address 0:
1. Make a one-to-one connection between the Modbus master and the
XVG/eXVG; no other Modbus device is present on the network.
2. Write a password to register 3099.
3. Write 1 to register 3005.
4. Write the new device address to register 3540.
5. Write 1 to register 3033. Wait 100 milliseconds.
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