Omron V680S-HMD63-ETN - Page 266

264
Data Characteristics
Section 11
RFID System
User's Manual
(Modbus TCP)
Section 11
Appendices
RF Tag Communications Time (for Reference Only)
 Communications Time
Communications time is from the rise of the RF signal to the last bit of the response from the RF tag.
The communication time is approximately 200ms longer when enabling Communications Diagnosis function.
V680S-HMD6@-ETN and V680-D1KP@@
There are no differences between Communication speed: “normal” and “high”.
V680S-HMD6@-ETN and V680-D8KF6@
• Communication Option: Other than FIFO Trigger (With ID code check)
There are no differences between Communication speed: “normal” and “high”.
• Communication Option: FIFO Trigger (With ID code check)
There are no differences between Communication speed: “normal” and “high”.
RF signal : The radio wave that the Reader/Writer turns ON the RF Tag.
The Reader/Writer turns ON this RF signal and then sends the command to start communications with the RF tag.
When the communications end, the Reader/Writer turns OFF the RF signal
Command : The command that the Reader/Writer sends to the RF Tag.
Response : The response that the RF Tag returns to the Reader/Writer.
Query Communications time (ms)
N: No. of bytes processed
Read T= 1.0N + 20.1
Write (with verification) T= 1.8N + 45.2
Write (without verification) T= 1.5N + 41.4
Query Communications time (ms)
N: No. of bytes processed
Read T= 1.0N + 19.7
Write (with verification) T= 1.3N + 38.1
Write (without verification) T= 1.0N + 34.3
Command Communications time (ms)
N: No. of bytes processed
Read T= 1.3N + 28.4
Write (with verification) T= 1.6N + 52.2
Write (without verification) T= 1.3N + 48.7
Command Response
RF signal
Communications time
0
0 50 100 150 200 250 300
No. of bytes (byte)
Communications time (ms)
50
100
150
200
250
300
350
600
400
Write (without verification)
Read
Write (with verification)
450
500
550
0
0 50 100 150 200 250 300
No. of bytes (byte)
Communications time (ms)
50
100
150
200
250
300
350
600
400
Write (with verification)
Write (without verification)
Read
450
500
550
0
0 50 100 150 200 250 300
No. of bytes (byte)
Communications time (ms)
50
100
150
200
250
300
350
600
400
Write (with verification)
Write (without verification)
Read
450
500
550