47
Communication Time
Section 4-6
4-6
Communication Time
The time required for communications varies with the DC memory type
(SRAM or EEPROM). Furthermore, if the memory is EEPROM, communica-
tions time varies with the slave communications mode setting. The communi-
cations time consists of TAT (turn around time) and slave communications
time. TAT is the time required for the host computer to receive a response
after it has finished sending a command. Slave communications time is the
time required for communications between the R/W Head and DC and is
exclusive of host communications time. Slave communications time is used
as a reference when calculating the moving speed of an auto command.
4-6-1
Communication Time
S-RAM DC (Reference)
EEPROM (Reference)
Communication Distance Priority mode
RD 0 0 1 1 2 2 ----------------*)
Response
Time required for
communications
with slave
TAT
Command
RDH 1 ----------------*)
(Example)
When writing/
auto writing
1,000
800
600
400
200
0
Comm
unication time with sla
v
e
(ms)
1
50
100
150
200
250
When reading/
auto reading
Number of processing bytes
▲
▲
Formula
(msec)
Communication Time
Read
T = 1.8 N + 48.4
Write
T = 4.2 N + 86.5
N: Number of processing bytes
2,000
1,500
1,000
500
0
Comm
unication time with sla
v
e
(ms)
100
200 300
When reading/
auto reading
Number of processing bytes
▲
▲
When writing/
auto writing
Formula
(msec)
Communication Time
Read
T = 4.3 N + 64.6
Write
T = 8.7 N + 167.1
N: Number of processing bytes
Summary of Contents for V600 RFID System
Page 1: ...OPERATION MANUAL Cat No Z193 E1 01 Board Type ID Controller V600 RFID System V600 CM1D...
Page 2: ...V600 RFID System V600 CM1D Board Type ID Controller Operation Manual Produced December 2003...
Page 3: ...iv...
Page 7: ...viii...
Page 10: ...xii...
Page 16: ...6 User I O Section 1 4...
Page 24: ...14 Outline Size Section 2 5...
Page 60: ...50 Communication Time Section 4 6...
Page 82: ...72 Index...
Page 84: ...74 Revision History...
Page 87: ...V6001 RFID System V600 CM1D Board Type ID Controller Cat No Z193 E1 01 OPERATION MANUAL...