Panasonic AFP0HC32ET User Manual page 6

Glossary
Term
Normal packet and
large packet
Protocol used for
cyclic communication
Heartbeat
Forward open
Large forward open
RUN/IDLE bit
Do not use "2222" and "44818" for the port numbers set to the connections
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of Ethernet communication.
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Description
The packet whose size is within 510 bytes is called normal packet. The packet whose
size is 511 bytes to 1444 bytes is called larget packet.
The maximum communication performance varies according to the data size used for
communication.
Performance index of FP0H
For 510 bytes or less: Max. 5000 pps
For 511 bytes or more: Max. 2500 pps
The cyclic communication is performed using UDP. The used port number is 2222.
For "Input Only" or "Listen Only", a packet called heartbeat whose data size is zero is
sent from the originator (FP0H). For the RPI of the heartbeat, the value 16 times of the
RPI of transmitted data from a target is automatically applied.
The heartbeat is used for confirming the continuation of the connection on the target
side. It is used for detect the timeout.
This is a command for opening the connection of EtherNet/IP and sent using TCP. The
used port number is 44818.
This is a command for opening the connection when sending/receiving data whose
size is larger than 511 bytes.
Operation state flag (RUN/IDLE) sent by connected devices in cyclic communication.
RUN ： 1
IDLE ： 0
When the RUN/IDLE bit of the originator does not change to RUN, the target may not
operate properly. For details, refer to "5.2.3 RUN/IDLE Bit".