View source for WRITE USER DEF DATA

{| border="1"  
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!style="background:#ffdead;" width="90pt" colspan="2"|WRITE_USER_DEF_DATA
!style="background:#ffdead;" width="100pt"|0x008A
!style="background:#ffdead;" width="30pt"|138	
!style="background:#ffdead;" |AMC 08.20
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|colspan="5"|'''$WUDD W 2 W 20'''      ''Write 20 to variable 2'' <br> '''$WUDD W 2 Q 100000'''  ''Write 100000 to variable 2'' 
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|colspan="5"|Write User Defined Data. Store data for your own purpose. An array of 600 variables (6000 AMC 9.01), each 16 bit (32 bit AMC 9.03), survives exchange reset. Read variable in Event Handler with [[%udd]](''index'').
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|align=center|1||[[UINT2]]||colspan="3"|Index to variable , 0 – 600, ( 0 - 6000 AMC 9.01)
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|align=center|2||[[UINT2]],<br\>[[UINT4]](AMC 9.03)||colspan="3"|Value to put in variable, 0 - 65535.<br\>(from [[AMC]] 9.03 both [[UINT2]] and [[UINT4]] are supported)
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|colspan="2"|Response:	
|colspan="3"|[[COMMAND_RESPONSE]](138,1,0) when success
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|}

Note that when used from the EventHandler, the data is written after the event handler action is completed. The event hander built in statement [[wudd]] takes on the other hand effect immediately, before next statement is executed. However, only DP message $wudd can write a value in a remote exchange. 

[[AlphaNet_Data_Protocol#General_Exchange_Control|Back to AlphaNet message list]]