App. - 4 App. - 4
MELSEC-Q
APPENDIX
Appendix 3 Differences between QJ71AS92 and A1SJ71AS92
(1) The following table indicates the differences in specifications
between the QJ71AS92 and A1SJ71AS92.
Specifications
Item
QJ71AS92 A1SJ71AS92
AS-i Standard
Ver. 2.11
Ver. 2.04
Max. number of AS-i system slaves
62 (Group A: 31 + Group B: 31)
31 (non- grouped) x 2 systems
Ver. 2.04-compatible I/O slave
Connectable
Connectable
Ver. 2.11-compatible I/O slave
Connectable
N/A
Connectable
slave type
Analog slave
Connectable
N/A
When slaves are not grouped into A
and B
• Ver. 2.04-compatible I/O slave
• Analog slave
• Ver. 2.11-compatible I/O slave
(When not grouped)
Approx. 5ms
Approx. 5ms
When slaves are grouped into A
and B
• Ver. 2.11-compatible I/O slave
(When grouped)
Approx. 10ms
N/A
I/O refresh
time
Analog slave
Approx. 35ms (channel 1)
Approx. 70ms (channel 2)
Approx. 105ms (channel 3)
Approx. 140ms (channel 4)
N/A
Internal memory
EEPROM (for registration of slave
configuration)
Number of writes: 100,000 times
max.
Flash ROM (for registration of slave
configuration)
Number of writes: 10,000 times
max.
Number of occupied I/O points
32 points (I/O assignment: 32
intelligent points)
32 points (I/O assignment: 32
special points)
(2) Precautions for diverting the system
The following table indicates the precautions for diverting the A1SJ71AS92
system.
No.
Item QJ71AS92
A1SJ71AS92
1 System
1 system
2 systems
2 Grouping
Allowed
(compatible with AS-i Ver. 2.11)
Not allowed
3
Connectable
slave
AS-i Ver. 2.04-compatible I/O slave
AS-i Ver. 2.11-compatible I/O slave
Analog slave
AS-i Ver. 2.04-compatible I/O slave
AS-i Ver. 2.04-compatible I/O slave
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