Mitsubishi Electric MELSEC-A Series Manual page 206

5
REPLACEMENT OF THE MELSECNET/10 (REMOTE I/O NETWORK)
(3) Comparison of AJ72BR15/AJ72QBR15/A1SJ72QBR15 and QJ72BR15 (MELSECNET/10
mode)
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>
{(LY + LB)  8 + (2 × LW)}
Maximum number of link
<Remote I/O station  remote master station>
points per 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
Maximum number of (Total number of PLC to
networks PLC networks and
remote I/O networks)
Number of stations connected
33 stations (Master station: 1, remote I/O station: 32)
in one network
Applicable cable 3C-2V, 5C-2V, 5C-FB
Overall distance 30km
3C-2V: 300m
Distance between stations
5C-2V, 5C-FB: 500m
Error control system
CRC (X
Loop-back function due to error detection or disconnection of a cable
Diagnostic function for checking local link lines
RAS function
Abnormal detection using the link special relay and link special register
Network monitoring and various diagnostic functions
Monitoring, program up/download with a peripheral device
Transient transmission
Dedicated link instruction
*1 For the A1SJ72QBR15, the maximum number of I/O points per remote I/O station is "X + Y
5
- 40
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
(MELSECNET/10 mode)
*1
X + Y 2048 points
: Partial change required, × : Incompatible
Precautions for replacement
Network No.240 to No.250 cannot
be set. Replace them with unused
network No.
For comparison of dedicated link
instructions, refer to Section 5.1.7
1024 points".