Rockwell Automation 1752-L24BBBE SmartGuard 600 Controllers User Manual - Manual (Page 25)

Rockwell Automation Publication 1752-UM001E-EN-P - June 2014 25
Installing and Wiring the SmartGuard 600 Controller Chapter 2
Understanding Node
Addressing To communicate on the DeviceNet network, each device requires its own
address. Follow the recommendations below when assigning addresses to the
devices on your network.
The standard DeviceNet network assigns communication priority based on the
device’s node number. The lower the node number, the higher the device’s
communication priority. This priority becomes important when multiple nodes
are trying to communicate on the network at the same time.
DeviceNet safety nodes have additional priority on the network, regardless of
node number. DeviceNet safety communication from devices with lower node
numbers have priority over DeviceNet safety communication from devices with
higher node numbers.
ATTENTION: Serious injury may occur due to the loss of required safety
function.
· Do not use test outputs as safety outputs.
· Do not use DeviceNet standard I/O data or explicit message data as safety data.
· Do not use status indicators for safety operations.
· Do not connect loads beyond the rated value to safety outputs or test outputs.
· Wire the controller properly so that the 24V dc line does not accidentally touch
the outputs.
· Ground the 0V line of the power supply for external output devices so that the
devices do not turn on when the safety output line or test output line is
grounded.
· Do not dismantle, repair, or modify the controller. Doing so may impair the
safety functions.
Table 2 - Node Address Recommendations
Give this device This address Notes
Scanner 0 If you have multiple scanners, give them the lowest
addresses in sequence.
Any device on your network, except
the scanner 1…61 Gaps between addresses are allowed and have no
effect on system performance. Leaving gaps gives you
more flexibility as you develop your system.
RSNetWorx for DeviceNet
workstation 62 If you connect a computer directly to the DeviceNet
network, use address 62 for the computer or
bridging/linking device.
No device 63 Leave address 63 open. This is where a non-
commissioned node typically enters the network.