Mitsubishi Electric MELSEC-A Series Manual page 181

5
REPLACEMENT OF THE MELSECNET/10 (REMOTE I/O NETWORK)
4) Performance comparison of AJ72BR15/AJ72QBR15/A1SJ72QBR15 and QJ72BR15
Item
LX/LY 8192 points
Maximum number
of link points per LB 8192 points
network
LW 8192 points
<Remote master station  remote I/O station>
Maximum number of link {(LY + LB) 8 + (2 × LW)}
points per station
<Remote I/O station  remote master station>
{(LY + LB) 8 + (2 × LW)}
Maximum number of I/O
X + Y
points per remote I/O station
Communication speed 10Mbps
Communication method Token bus method
Synchronous type Frame synchronization method
Encoding method Manchester code
Transmission method Single bus
Transmission format HDLC standards (frame format)
255 (Total number of
Maximum number of PLC to PLC networks
networks and remote I/O
networks)
Number of stations connected
33 stations (Remote master station: 1, remote I/O station: 32)
in one network
Applicable cable 3C-2V, 5C-2V, 5C-FB
3C-2V: 300m
Overall distance
5C-2V, 5C-FB: 500m
3C-2V: 300m
Distance between stations
5C-2V, 5C-FB: 500m
Error control system
CRC (X
• Loop-back function due to error detection or broken cable
• Diagnostic function for checking local link lines
RAS function
• Abnormal detection using link special relays and link special registers
• Network monitoring and various diagnostic functions
• Monitor, program up/download with
peripheral device
Transient transmission • Dedicated link instruction
• Available for Intelligent function module
(only AJ71QBR15/A1SJ72QBR15)
Remote master station  remote sub-master station, remote I/O station: 8192 points
*1
Remote sub-master station, remote I/O station  remote master station: 8192 points
*2 The remote master station includes the multiplexed remote master station and multiplexed remote sub-master station.
*3 When the X/Y numbers are duplicate, one side only is taken into consideration.
*4 For the A1SJ72QBR15, the maximum number of I/O points per remote I/O station is "X + Y
*5 For the multiplexed remote I/O network, one station in 32 stations of the remote I/O station is used for the multiplexed
remote sub-master station.
Specifications
AJ72QBR15
AJ72BR15
A1SJ72QBR15
1600 bytes
1600 bytes
2048 points X + Y 2048 points
239 (Total number of PLC to PLC networks and
remote I/O networks)
16 12 5
+X +X +1) and retry by a time over
: Compatible,
Compatibility
QJ72BR15
*1
16384 points
*1
16384 points
*2
*2
*4 *3
X + Y 4096 points
*5
• 1:1 communication
(Monitor, program up/
download)
• Dedicated link instruction
: Partial change required, × : Incompatible
Precautions for replacement
Network No.240 to No.250 cannot
be set. Alternate them with
unused network No.
For comparison of dedicated link
instruction, refer to Section 5.1.7.
1024 points".
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