App - 2
Appendix 2 A Series Modules
Appendix 2.1 Comparisons in performance specifications
APPENDICES
Appendix 2 A Series Modules
This section presents comparisons in performance and functions between the QJ71MB91
and A Series modules, and utilization of existing programs.
Appendix 2.1 Comparisons in performance specifications
: Compatible : Partially changed : Incompatible
* 1 The connector of the cable must be changed.
TableApp.2 Comparisons in performance specifications
Item
Specifications
Compatibility
AJ71UC24-S2
A1SJ71UC24-R2-S2
A1SJ71UC24-R4-S2
QJ71MB91
Transmission
specifications
Interface
RS-232
RS-232 compliant (D-Sub 25-pin)
or, RS-232 compliant (D-Sub 9-pin)
RS-232 compliant (D-Sub 9-pin)
*1
RS-422/485 RS-422/485 compliant
RS-422/485 compliant
(Detachable terminal block)
Transmission speed 300 to 19200 bps 300 to 115200 bps
Transmission
distance
(Overall
distance)
RS-232 Max. 15m (49.2 ft.)
RS-422/485
Max. 500m (3936.9 ft.) (Overall
distance)
Max. 1200m (3936.9 ft.) (Overall
distance)
Master
function
Automatic
communication
function
Number of slaves
-
(None)
32 per channel
-
Function (for send) 7 functions
Input area size 4k words
Output area size 4k words
Dedicated
instruction
No. of simultaneously
executable instructions
1 instruction per channel
Function (for send)
MBRW instruction: 9 functions
MBREQ instruction: 19 functions
Input area size Max. 253 bytes per instruction
Output area size Max. 253 bytes per instruction
Slave
function
Automatic
response
function
Function (for receive) 13 functions 17 functions
MODBUS
device size
Coil 10000 points 64k points
Input 0 points 64k points
Input register 0 points 64k points
Holding register 10000 points 64k points
Extended file register 8192 points (1 file) Max. 1018k points (105 files)
No. of simultaneously acceptable request
messages
1 request per channel
Max. access points per message 256 points
Max. points prescribed by
MODBUS protocol
Station No. 1 to 99 1 to 247
Number of occupied I/O points
32 points per slot
(I/O assignment: Special 32 points)
32 points per slot
(I/O assignment: Intelli. 32 points)
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