Hamilton Sundstrand Company Fuel Metering Valves XVG Benutzerhandbuch

 

 

 

 

-  Only one host master can send request message at a time. 
-  Each XVG/eXVG unit on the same network must have a unique address. 
-  Adhere to the tables of registers provided and their allowable data range.   
-  Do not attempt to write to any register if you are not sure of the consequence.   
-  Do not write to registers that are for options your XVG/eXVG does not have.   

 

Failure to do so can result in erratic control and/or damage to equipment.  Care 
must also be taken that the process cannot cause damage to property or injury to 
personnel if the wrong commands are sent due to operator error or equipment 
malfunction. 

 

-  Reading from or writing to a register that does not exist or is currently 

disabled will result in a “time-out response”, or in other words, the 
XVG/eXVG will not reply with a message. 

-  Messages with the wrong format, timing, or CRC are ignored.   
-  Writing to a read-only register, writing with out-of-range data, or writing with 

improper permission will result in response error messages.  

-  It is the user’s responsibility to handle the error appropriately and determine 

whether to resend the message or halt the operation. 

 

Following are a few sample procedures for XVG/eXVG Modbus application: 

 

 

Following are examples of the real time parameters that can be read at anytime. 

 

7000 

IDM_POSININCHES 

Valve Position in inches 

Float 

7002 

IDM_INPUTPRES 

Input Pressure, PSIA 

Float

 

7004 IDM_OUTPUTPRES 

Output 

Pressure, 

PSIA 

Float

 

7008 

IDM_MEASFLOW 

Measured Flow, PPH 

Float

 

7014 

IDM_GASTEMP 

Gas Temperature, degrees F (includes TEMPOFF) 

Float

 

7016 

IDM_VOLTS3PT3 

3.3V supply voltage, Volts 

Float

 

7018 IDM_PRESSRATIO 

Pressure 

Ratio 

Float

 

7020 

IDM_DMDININCHES 

Position Demand in inches 

Float

 

7074 

IDM_TEMPAMB 

Approx. ambient temp. of electronics cavity, deg C 

Float

 

7084 

IDM_VOLTSPOS15 

+15V supply voltage, Volts 

Float

 

7086 

IDM_VOLTSNEG15 

-15V supply voltage, Volts 

Float

 

7104 

IDM_MOTORCUR 

Motor current, approximation in Amps 

Float

 

7106 

IDM_TIT 

Total inches traveled 

Float

 

 

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