hi, all:
I am using s7-plc driver written by Dirk, while I met a problem. while the driver connetcs to plc, it will clear the data buffer of PLC to zero. the database is like following:
record(ao,"$(id):cmd_gap_pos_cmd")
{
field(DESC,"command gap position")
field(SCAN, "Passive")
field(DTYP,"S7plc")
field(OUT,"@Siemens_S7: 0/2 'T=UINT32'")
field(LINR,"LINEAR")
field(LOPR,0)
field(HOPR,4294967295)
field(EGUL,0)
field(EGUF,429496.7295)
field(DRVL,17.0000)
field(DRVH,140.0000)
field(EGU,"mm")
field(PREC,"4")
}
I remember the Passive mode will not write data to PLC when connecting, but why it can't work? Can anyone give some hints? thanks a lot for your help.
Best regards
Geyang 2008-11-05
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