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DeviceNet Network Scanner DVPDNET-SL
DVP-PLC Operation Manual
4
1.3 I/O Scan List
Item Explanation Software screen
Scan
Table
Before DVPDNET-SL starts its operation, you
have to configure its scan list through the
configuration software. The scan list is a list
consisting of the information of slave devices with
data, e.g. slave address, I/O type, I/O data length
and so on, to be exchanged with DVPDNET-SL.
DVPDNET-SL is responsible for managing the
slave devices in the scan list, establishing
connections and exchanging I/O data with them.
DVPDNET-SL will not establish connections and
exchange I/O data with slave devices which are
not configured in the network.
I/O Table
DVPDNET-SL provides an Input Table (380
bytes) and an Output Table (380 bytes) for the
data exchange with slaves. When a slave device is
configured into the scan list, the software will
automatically allocate a I/O data exchange are of
corresponding length to the slave from the
mapping table. The I/O table is the data exchange
interface between the PLC MPU and the slave
device. It corresponds the I/O data in the D
register of the MPU with the I/O data in the slave.
After you configure the network, download the
configured data to DVPDNET-SL, and it will start
the I/O data exchange with the corresponding
slave device according to the configured data
received. Data in Output Table will be sent to the
salve, and data returned from the slave will be
filled into Input Table.
1.4 Specifications
DeviceNet connection
Transmission method CAN
Electrical isolation 500 VDC
Interface Removable connector (5.08mm)
Transmission cable 2-wire twisted shielded cable with 2-wire bus power cable and drain
Communication
Message type I/O polled, bit-strobe, change of state, cyclic
Baud rates 125 kbps; 250 kbps; 500 kbps
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