Delay Time Of Communication Data; Delay Time Of Sent Data - Panasonic AFP0HC32ET User Manual

Startup and Operation

5.4 Delay Time of Communication Data

5.4.1 Delay time of sent data

When a destination device in the cyclic communication controls the data sent from the FP0H
to it, each delay time of the FP0H and destination device should be considered.
 Delay on the FP0H side
A delay caused by the transmission cycle of cyclic communication and the FP0H refresh
timing occurs. The delay time on the FP0H side depends on the scan time of the FP0H and
the RPI value of the EtherNet/IP communication.
Pattern Relation between scan time and RPI
Scan time is smaller than RPI
1 and
Scan time x 4 is larger or equal to RPI
Scan time is smaller than RPI
2 and
Scan time x 4 is smaller than RPI
3 Scan time is nearly equal to RPI
4 Scan time is larger than RPI
 Delay on the destination device side
The delay time on the destination device side is the total of the delays caused by reception
processing and output control to output devices.
Delay time of destination device = Delay by reception processing + Delay by output control to
output device
* The delay time on the destination device side varies depending on devices. Refer to
respective manuals of destination devices.
5-8
Delay time
Scan time
Larger value of
scan time x 4
or RPI x 1/16
Scan time (RPI)
RPI