2nd Ave. DVPDNET-SL DeviceNet Network Scanner DVP-0204520-02 - Manual (Page 28)

DeviceNet Network Scanner DVPDNET-SL
DVP-PLC Operation Manual 26
editing area to 0.
„ When M1 = On, DVPDNET-SL will send out request message. Write 0004Hex into Class 99 >>
Instance 1 >> Attribue 2 of the target equipment (node address: 02). If the communication of
explicit message is successful, the slave will return with a response message.
„ When M1 = On, DVPDNET-SL will only send out request message once. If you would like it to
send out request message again, you will have to change ReqID.
„ When the writing is successfully done, the message responded from the target equipment will be
stored in D6000 ~ D6003.
7 Bit-Strobe Command
7.1 Principle of Bit-Strobe
Bit-strobe is one of the standard I/O transmission methors for DeviceNet. The length of command is fixed to
8 bytes (i.e. 64 bits), and every bit corresponds to a slave.
Corresponding nodes on the network
PLC
device
b15 b14 b13 … b1 b0
D6282 Node 15 Node 14 Node 13 … Node 1 Node 0
D6283 Node 31 Node 30 Node 29 … Node 17 Node 16
D6284 Node 47 Node 46 Node 45 … Node 33 Node 32
D6285 Node 63 Node 62 Node 61 … Node 49 Node 48
When b0 of D6282 = 0, the node 0 equipment will be selected, and it will need to respond with a message to
the master. When b0 and b1 of D6282 = 0, the node 0 and node 1 equipment will be selected, and they will beed
to respond with a message to the master.
b0 b1 b17 b15 b14 b30 b2 b18 b16 b31
D6283
Node 0
Node 1
Node 2
Node 14
D6282
In the bit-strobe mode, the master will not send control data to the slave node. However, when its
corresponding bit is set to 0, the slave node will have to respond with I/O data to the master. When its
corresponding bit is set to 1, the slave node will not have to respond with I/O data to the master.
8 Display of Node Status on Network
8.1 Display of Node Status in Scan List
DVPDNET-SL does read-time monitoring to the nodes in the scan list and maps the status of every node to a
bit. You can acquire the node status by monitoring D6032 ~ D6035. See the table below for the corresponding
relation between PLC devices and the nodes on the network: