The
driver supports spontaneous transmission from the PLC, which means
it will receive data that does not come in response to a FETCH
command, but in a spontaneous SEND command from the PLC. The target
address in this message can be set as required. Since the driver
can only identify the data point using this address, however,
the address field of the message should contain the source address
of the data. In order to be able to identify the associated data
point from the hardware address, this data point must have the
corresponding peripheral address and the subindex '0'. |