Before You Begin - Parker H Series Installation & Service Instructions Manual

1-2 Get Started

Before You Begin

Publication DNET-UM072C-EN-P - July 2004
Before you begin laying out your DeviceNet network, take a few minutes to
consider the following decisions you must make.
1. What control platform should I use?
For help with choosing the correct control platform for the
application, refer to Chapter 2 of the NetLinx Selection Guide,
publication NETS-SG001.
After selecting the control platform, use Chapter 2 of the NetLinx
Selection Guide, publication NETS-SG001, to help you choose the
DeviceNet communication interface for that platform.
Once you have selected all DeviceNet devices for your
TIP
network, calculate the total data size required by the
DeviceNet-networked devices. Compare the total data
size required against the total amount available from
the DeviceNet scanner module you have selected.
2. What I/O devices will I need?
For help with choosing the correct I/O devices for the application,
refer to Chapter 2 of the NetLinx Selection Guide, publication
NETS-SG001.
If you plan to hard-wire certain devices to I/O modules, calculate
the total number of discrete I/O points, such as sensors, photoeyes,
etc., in your application.
TIP
Calculate the total required analog I/O channels.
Calculate the total I/O points being brought into I/O modules
versus direct connections to the network.
Decide which type of discrete I/O you will use in your application:
sealed (such as FLEXArmor or MaXum), or open-style (typically
contained in enclosures).
All DeviceNet-capable devices require a unique
network node number, which counts against the total
node count of 63. If the I/O points are standard
discrete versions, they will be connected to t he
DeviceNet network via a discrete I/O-to-DeviceNet
adapter. In this case, only the I/O adapter would
require a network node number, allowing you to
connect multiple I/O points with one adapter.