FB_WriteAdsSymByName

Writing any desired value to another controller with the aid of the symbol name.

On a rising edge at the bWrite input the block writes the value to which the pointer nSrcAddr points into the variable sVarName of the selected ADS device (e.g. PLC). The ADS device is indicated by the AMS-NetId (sNetId) and the AMS Port number (nPort).

The internal mode of operation of the block can be changed with the aid of the eComMode input:

eComMode := eAdsComModeSecureCom: Following each write procedure the handle of the PLC variable is released again. This mode should be used when values are exchanged very slowly.

eComMode := eAdsComModeFastCom: As long as the sVarName, sNetID and nPort inputs do not change, the handle of the PLC variable will not be released after each write procedure. This mode should be used when values are exchanged very frequently.

bWrite       : BOOL;
sNetId       : T_AmsNetId;
nPort        : T_AmsPort := AMSPORT_R0_PLC_RTS1;
sVarName     : STRING;
nSrcAddr     : DWORD;
nLen         : UDINT;
tTimeout     : TIME := DEFAULT_ADS_TIMEOUT;
eComMode     : E_AdsComMode := eAdsComModeSecureCom;

bBusy        : BOOL;
bError       : BOOL;
nErrorId     : UDINT;