Delta RMC151 - Manual (Page 469)

6 Communication
O->T Format 32-bit Run/Idle
3
Heartbeat
O->T Fixed/Variable Fixed
3
O->T Connection Type Point-to-point
3
O->T Priority Scheduled
3
O->T Size 4, 8, …, 496 bytes 0 bytes
T->O Format Modeless
3
T->O Fixed/Variable Fixed
3
T->O Connection Type Point-to-point or Multicast
T->O Priority Scheduled
3
T->O Size 4, 8, …, 500 bytes
O->T RPI 2ms to 10000ms
T->O RPI 2ms to 10000ms
Configuration Data Size 0 bytes
1
The term ‘Assembly Instance’ is used by some applications instead of ‘Connection Point’.
2
The Input and Output Connection Points and Config Data Assembly Instance are implied
by the Connection Path. Therefore, configuration tools will generally either ask for the
Connection Points and Instances or the Connection Path but not both.
3
This value is the common default value for this setting and the option to change this
field may not be offered by the configuration tool.
Unfortunately which fields are required and how they are presented varies significantly
from one tool to the next. For this reason, most EtherNet/IP configuration tools are
moving toward supporting importing EDS files to reduce the complexity of setting up an
I/O connection.
The following chart shows the fields required to set up an EtherNet/IP generic device
connection using Rockwell Automation’s RSLogix 5000. For step-by-step instructions on
setting up an Input/Output connection using RSLogix 5000, see the Using Allen-Bradley
Controllers via EtherNet/IP I/O topic.
Setting
Connection Type
Input/Output Input Only Listen Only
Comm Format Data – REAL Input Data – REAL Input Data – REAL
Input Assembly Instance 1 1 1
Input Size 1-125 (32-bit) 1-125 (32-bit) 1-125 (32-bit)
Output Assembly Instance 2 32 33
Output Size 1-124 (32-bit) -- --
Configuration Assembly Instance 4 4 4
Configuration Size 0 (8-bit) 0 (8-bit) 0 (8-bit)
Requested Packet Interval (RPI) 2.0ms - 3200.0ms 2.0ms - 3200.0ms 2.0ms - 3200.0ms
Use Unicast Connection
Yes or No No No
Quality of Service (QoS)
The Quality-of-Service (QoS) object in EtherNet/IP allows managed Ethernet switchgear
to prioritize EtherNet/IP packets to provide higher levels of determinism.
802.1D/Q priority tagging is disabled by default because some devices and switches
discard packets with 802.1Q tags. Therefore, it is important to properly design and test
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