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91
Communications Time
Section 6-3
6-3
Communications Time
6-3-1
Data Carrier Communications Time
The communications time with the Data Carrier depends on the type of mem-
ory in the Data Carrier (SRAM or EEPROM). For EEPROM Data Carriers, the
communications time also depends on the communications mode setting.
SRAM Data Carriers (Reference Data)
EEPROM Data Carriers (Reference Data)
Communications Distance Priority Mode
Communications Time Priority Mode
Note
1.
The ID Sensor Unit’s communications mode is set in the Special I/O Unit
words in the DM Area. (Refer to
page
41.)
2.
The communications time for SRAM (built-in battery) Data Carriers does
not depend on the communications mode.
1,000
800
600
400
200
0
1
50
100
150
200
250
No. of bytes processed
Read
Write with verification
Write with no verification
Communications time
T = 1.8 N + 48.4
T = 4.2 N + 86.5
T = 2.2 N + 72.8
N: Number of processed bytes
Formulas
(ms)
Comm
u
nications time (ms)
Write with verification
Write with no verification
Read
2,000
1,500
1,000
500
0
100
200
300
No. of bytes processed
T = 4.3 N + 64.6
T = 8.7 N + 167.1
T = 4.3 N + 132
Comm
unications time (ms)
Read
Read
Write with verification
Write with no verification
Communications time
N: Number of processed bytes
Formulas
(ms)
Write with verification
Write with no verification
2,000
1,500
1,000
500
0
100
200
300
No. of bytes processed
T = 1.8 N + 79.0
T = 7.1 N + 180.4
T = 4.3 N + 132
Read
Write with verification
Write with no verification
Communications time
N: Number of processed bytes
Formulas
(ms)
Comm
unications time (ms)
Write with verification
Write with no verification
Read
Summary of Contents for CJ - 12-2004
Page 2: ...SYSMAC CS CJ Series ID Sensor Units Operation Manual Revised December 2004...
Page 3: ...iv...
Page 11: ...xii...
Page 55: ...36 Connections and Wiring Section 3 4...
Page 69: ...50 I O Data Allocations Section 4 3...
Page 91: ...72 Data Check Section 5 7...
Page 141: ...122 Sample Programming Appendix B...
Page 147: ...128 Revision History...