Panasonic FP7 User Manual page 18

Description of EtherNet/IP Communication Function
Term
Connection type
Instance ID/Tag name
Data size
Refresh method
Parameter change
PPS performance index
(Packet per sec)
Normal packet and
large packet
2-6
Description
Select a communication method that is selectable for the selected connection.
1 : 1:1 communicaion (Point to Point)
2 : Multicast communication (Multicast)
The point-to-point communication is a 1 to 1 communication between the connection
source and destination.
Transmission packet is received by the source device or destination device only.
Other devices connected to the same HUB does not receive the transmission packet.
In the mutlicast communication, transmission data is sent as multicast packet.
By connecting multiple sources to the same connection, single multicast packet can
be received by the multiple connection sources.
The multicast packet is basically received by all the devices connected to the same
HUB which includes the devices unrelated to the communication, and it leads to an
unnecessary communication load.
Therefore, set not to exceed 100% with the load factor caclulation of the setting tool
when using the mutlicast communication.
Also, it is recommended to use a HUB with a multicast filter.
Set an instance ID or tag name according to the communication method of the
selected connection.
Set the communication data size according to the communication setting of each
adapter device.
Set this as well as changing the setting for the scanner, otherwise the communication
cannot be performed as it does not match the setting of adapters.
There are the following two refresh operations.
1 : Transfers the data sent to adapters to send buffers from allocated operation
memories.
2 : Transfers the data sent from adapters to allocated operation memories from
receive buffers.
The refresh method can be selected from three types, Batch, Divice and Instruction.
Parameters that can be changed by EDS can be changed.
This is an index of sent/received packets processed in one second.
The packet whose size is within 504 bytes is called normal packet. The packet whose
size is 505 bytes to 1444 bytes is called larget packet.
The amximum communication performance varies according to the data size used for
communication.
Performance index of FP7
When the size is 504 bytes or less: Max. 10000 pps
When the size is 505 bytes or more: Max. 5000 pps