Hello,
I am able to change axis postion limits OK via PLC using DL_WriteNode to path 'motion/axs/{axisname}/cfg/lim/pos-max' for example but after power cycle the change is lost.
How do I make the change permanent?
Many thanks
How to Retain Axis Position limits Set by PLC Program
Best reply by CodeShepherd
Like when using the ctrlX CORE Web UI you need to execute a save after changing the values to persists them to the active configuration. Then it will be the same after power cycle.
Right now I only know the way of writing the corresponding flatbuffer:
Declaration:
PROGRAM PLC_PRG
VAR
fb_comm_datalayer_PersistenceParam: comm_datalayer_PersistenceParam;
fb_DL_CreateNodeValue: DL_CreateNodeValue;
bExecute: BOOL;
bDone: BOOL;
bActive: BOOL;
bError: BOOL;
NodeValueOut: CXA_Datalayer.DL_NodeValue;
NodeValueIn: CXA_Datalayer.DL_NodeValue;
bWrite: BOOL;
fbBuilder: flatbuffers.FlatBufferBuilder;
udiPhase: UDINT;
strPhase: STRING := 'save';
udiConfigurationPath: UDINT;
strEmpty: STRING := '';
udiId: UDINT;
END_VAR
VAR_INPUT
NodePath: STRING(255) := 'motion/axs/Axis_1/cfg/save';
END_VARImplementation:
IF bWrite THEN
fbBuilder(forceDefaults := TRUE); //Start flatbuffer builder and load with default values
udiPhase := fbBuilder.createString(strPhase);
udiConfigurationPath := fbBuilder.createString(strEmpty);
udiId := fbBuilder.createString(strEmpty);
fb_comm_datalayer_PersistenceParam.startPersistenceParam(fbBuilder);
fb_comm_datalayer_PersistenceParam.addPhase(udiPhase);
fb_comm_datalayer_PersistenceParam.addConfigurationPath(udiConfigurationPath);
fb_comm_datalayer_PersistenceParam.addId(udiId);
fbBuilder.finish(fb_comm_datalayer_PersistenceParam.endPersistenceParam());
NodeValueIn.SetFlatbuffer(fbBuilder); //Set flatbuffer out of the builder in the variable to be written
bExecute := TRUE;
bWrite := FALSE;
END_IF
fb_DL_CreateNodeValue(
Execute:= bExecute,
Done=> bDone,
Active=> bActive,
Error=> bError,
ErrorID=> ,
ErrorIdent=> ,
ClientId:= ,
NodeName:= NodePath,
NodeValueIn:= NodeValueIn,
NodeValueOut:= NodeValueOut);
IF bDone THEN
bExecute := FALSE;
END_IF
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