Mitsubishi Electric MELSEC-A Series Manual page 179

5
REPLACEMENT OF THE MELSECNET/10 (REMOTE I/O NETWORK)
2) Performance comparison of AJ72LP25G/AJ72QLP25G and QJ72LP25G
Item
LX/LY 8192 points
Maximum number
LB 8192 points
of link points per
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 ring method
Synchronous type Frame synchronization method
Encoding method NRZI coding (Non Return to Zero Inverted)
Transmission method Duplex loop
Transmission format HDLC standards (frame format)
255 (Total number of PLC to
Maximum number of
PLC networks and remote I/
networks
O networks)
Number of stations connected
65 stations (Remote master station: 1, remote I/O station: 64)
in one network
Applicable cable GI optical cable
Overall distance 30km
Distance between stations GI optical cable: 2km
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
AJ72QLP25G)
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 multiplexed remote I/O network, one station in 64 stations of the remote I/O station is used for the multiplexed
remote sub-master station.
Specifications
AJ72LP25 AJ72QLP25G
1600 bytes
1600 bytes
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 Precautions for replacement
QJ72LP25G
*1
16384 points
*1
16384 points
*2
*2
*3
X + Y 4096 points
*4
• 1:1 communication
(Monitor, program up/
download)
• Dedicated link
instruction
: Partial change required, × : Incompatible
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.
5
- 13