Rf Tag Communications Times (For Reference Only - Omron V780-Series User Manual

Appendices
A-2 RF Tag Communications Times (for
Reference Only)
The RF communications time is the time from when the host device sends a communications command
to the Reader/Writer until it receives a response. The communications time differs depending on the
radio regulations of each country, or the settings of the RF communications command and RF commu-
nications speed. In actual usage, the communications time may change under the influence of the
installation environment, system conditions, type of RF Tags, and other factors. Perform sufficient test-
ing in advance.
Precautions for Correct Use
If you enable communications diagnostics, the communications times will be increased by up to
100 ms.
Measurement Conditions
Measurement environment
RF Tag
Communications distance
Transmission power
RF communications speed
Communications command
Communications distance
*1. The RF Tag was mounted to a V780-A-TA-133-10 Attachment.
Precautions for Correct Use
With multiaccess communications, collisions occur between communications with multiple RF
Tags. Therefore, the communications time varies more than with single-access communica-
tions. The communications time also varies with the RF Tags that are used, the orientation of
the RF Tags, and the ambient environment. Therefore, the communications times in the above
graphs are strictly for reference only. Use them only as reference values for determining com-
munications timeout times in the actual environment.
A - 4
Radio wave darkroom
V780-A-JIME-Z3BLI-10 (made by Toppan Forms Co., Ltd.)
Fixed at 0.5 m (between Reader/Writer and RF Tag)
27 dBm
Given below.
Given below.
Fixed at 0.5 m (between
Reader/Writer and RF Tag)
m
0 . 5
UHF RFID System V780-series Reader/Writer User's Manual (EtherNet/IP
*1
Fixed at 1.8 m (between
Reader/Writer and RF Tag)
1 to 64 sheets
m
1 . 8
TM
) (Z402)