Hitachi SJ100DN DeviceNet Series Addendum Instruction Manual Addendum page 41

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SJ100DN Inverter
Step 1 – Design Your DeviceNet Network Layout
Your DeviceNet network layout will be determined by several factors, including the
physical machine or plant layout. The network must have one network master, or host
computer such as a PLC or control PC. The SJ100DN Series inverter is a DeviceNet
slave. The network can have up to 63 slaves which can include inverter(s), sensors,
actuators, or other intelligent devices.
Master
(network host)
Slave Slave Slave (up to 63
Slaves)
Addr=29 Addr=04 Addr=12 Addr=63 Addr=44
(default)
The network diagram above shows a network master (host computer), and four slave
devices. Each device constitutes a "node," and each node must have a unique address.
The address is also called the MAC ID (Media Access Control Identification). As shown
in the diagram, the node addresses do not have to occur in a particular sequence in the
physical layout.
Showing node connections now in greater detail, the connection to each device in the
middle of the network may be a daisy-chain connection or a drop connection. The differ-
ence is that a daisy-chain connection enters and exits right at the connector, while a drop
connection inserts an extra segment just for the device. The device at each end of the
physical network must include a termination resistor. The host computer and the inverter
may be in the middle or at the ends of the network.
Drop
line
Termination Daisy- Tap Daisy- Termination
chain chain
Trunkline