Panasonic AFP0HC32ET User Manual page 5

Term
Communication Method
(Tag/Instance)
Input Send Trigger
COS Transmission
Disable Time
Timeout Period
Input Information (T>O)
Output Information
(O>T)
RPI
(Requested Packet
Interval)
Point to Point
(1:1 communication)
Multicast
(Multicast
communication)
TTL
Instance ID/Tag name
Data Size
Parameter setting
PPS performance index
(Packet per sec)
Description
For connecting from an originator to target, there are two methods to specify the
device area of the target.
- by specifying numbers (Instance)
- by specifying symbols (Tag).
When setting connections, the methods available for each target are displayed.
For using the FP0H as a target, either method can be selected.
However, the selectable instance numbers for the instance method are 100 to 199.
The transmission timing is selected from Cyclic or COS (Change of state).
However, COS depends on devices.
COS is basically a cyclic communication, however, it also performs transmission
when sent data changes.
The FP0H does not support COS.
Transmission disable time (RPI of input information x 1/4) is displayed when "Input
Send Trigger" is set to "Change of State (COS)".
Even if the unit detects the change in data, it is not sent within the transmission
disable time.
In the cyclic communication, transmission data is sent as UDP packet. The timeout is
judged on a receiver side.
The timeout period is selected from 4, 8, 16, 32, 64, 128, 256 and 512 times of RPI.
The timeout period should be 10 msec or more.
RPI can be specified for T>O direction and O>T direction separately, so each timeout
period may be different values.
This is the setting for the transmission from a target to the FP0H (originator).
This is the setting for the transmission from the FP0H (originator) to a target.
Set the transmission interval for the cyclic communication. Set a value within the
communication capacity of a target. The usable RPI range depends on devices.
For the FP0H, it is 1 ms to 10 s (by 0.5 ms).
One to one communication is performed between an originator and a target.
Transmitted packets are received only by each other.
Other devices connected to the same HUB do not receive those transmission
packets.
Transmission data is sent as a multicast packet. By connecting multiple originators to
one target, one multicast packet can be received by multiple originators.
(Note) Multicast packets are basically received by all devices connected to the same
HUB which includes the devices unrelated to the communication, and it leads to an
unnecessary communication load.
When using the multicast communication, set not to exceed 100% by the load factor
calculation of the setting tool.
TTL (Time To Live) is used to set the hierarchies of the network in which transmission
packets can exist when sending multicast packets to other PLCs.
Set an instance ID or tag name according to the communication method of the
selected connection.
The data sizes of the originator and target for the cyclic communication must be the
same. When they do not match, the communication cannot be performed.
Data size, instance ID and other parameters that can be changed in the EDS file can
be changed.
This is an index of sent/received packets processed in one second.
Glossary
iii