def read(self, adsAdr):
"""
Read from plc address and write in self.currentValue,
call pyads.gui.mapAdsToGui() to show the value on
the connected gui objects
:param pyads.structs.AmsAdr adsAdr: address to the ADS device
:return: current value
"""
indexgroup = INDEXGROUP_MEMORYBIT if self.plcDataType == PLCTYPE_BOOL else INDEXGROUP_MEMORYBYTE
(err, value) = adsSyncReadReq(adsAdr, indexgroup, self.plcAdr, self.plcDataType)
if err:
raise Exception("error reading from address %i (%s). error number %i" % (self.plcAdr, self.name, err))
#Wenn es sich um eine Liste oder ein Tuple handelt, dann einzelne Objekte schreiben*)
if isinstance(self.guiObjects, (list, tuple)):
for o in self.guiObjects:
self.mapAdsToGui(o, value)
else:
self.mapAdsToGui(self.guiObjects, value)
self.currentValue = value
return value
def read_from_plc(self, address, datatype):
index_group = INDEXGROUP_MEMORYBIT if datatype == PLCTYPE_BOOL else INDEXGROUP_MEMORYBYTE
(errcode, value) = adsSyncReadReq(self.ams_addr, index_group, address, datatype)
if errcode:
raise ADSError("Reading from address %i (ErrorCode %i)" % (address, errcode))
return value
