Bit-Strobe Command; Principle Of Bit-Strobe - Delta DVPDNET-SL Operation Manual

6 Bit-Strobe Command

6.1

Principle of Bit-Strobe

Bit-strobe is one of the standard I/O transmission methods for DeviceNet. The size of the command is fixed to
8 bytes (i.e. 64 bits), and every bit corresponds to a slave.
Note: Different PLC corresponds to different device addresses. For details, please refer to Input and Output
Mapping Areas in Section 4.2. We take DVP-SV as the PLC for description below.
PLC
device
D6282 Node 15
D6283 Node 31
D6284 Node 47
D6285 Node 63
When b0 of D6282 is 0, the node 0 equipment will be selected, and it will need to respond with a message to
the master. When both b0 and b1 of D6282 are 0, node 0 and node 1 are selected and they need to send
back the response message to the master.
b31 b30
In the bit-strobe mode, the master will not send control data to slave nodes. 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.
DVP-PLC Operation Manual
DeviceNet Network Scanner DVPDNET-SL
Corresponding nodes on the network
b15 b14
Node 14 Node 13
Node 30 Node 29
Node 46 Node 45
Node 62 Node 61
D8283
b18 b17 b16
b13 ...
...
...
...
...
D6282
b15 b14
b1 b0
Node 1 Node 0
Node 17 Node 16
Node 33 Node 32
Node 49 Node 48
b2 b1 b0
Node 0
Node 1
Node 2
Node 14
23