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MELSEC-Q
3 SPECIFICATIONS
3 SPECIFICATIONS
The following describes the network system specifications, performance specifications
and the specifications for sending and receiving link data.
For general specifications, refer to the user's manual of the CPU module to be used on
the network system.
3.1 Performance Specifications
3.1.1 Optical loop system performance specifications
Table 3.1 lists the performance of the optical loop system.
Table 3.1 Optical loop system performance specifications
Item
Remote master station Remote I/O station
QJ71LP21 QJ71LP21G QJ71LP21GE QJ71LP21-25 QJ71LP21S-25 QJ72LP25-25 QJ72LP25G QJ72LP25GE
Maximum
number of links
per network
LX/LY 8192 points
LB
16384 points (Remote master station
remote sub-master station, remote I/O station: 8192 points, remote sub-master
station, remote I/O station
remote master station: 8192 points)
LW
16384 points (Remote master station
remote sub-master station, remote I/O station: 8192 points, remote sub-master
station, remote I/O station
remote master station: 8192 points)
Maximum number of links per
station
• Remote Master Station
Remote I/O station ((LY + LB)/8 + (2 LW))
1600 bytes
1
• Remote I/O station Remote Master Station ((LX + LB)/8 + (2 LW)) 1600 bytes
• Multiplexed remote master station multiplexed remote sub-master station ((LY + LB) /8 + (2 LW)) 2000 bytes
Maximum I/O points per remote
I/O station
X + Y
4096 points
If the X/Y numbers are the same, only one side is taken into consideration.
Device points per
remote I/O station
M 8192 points
SM 2048 points
D 12288 points
SD 2048 points
Communication speed 10 Mbps
25 Mbps /10 Mbps /
(selected with MODE switch)
10 Mbps
Number of stations per network 65 stations (Remote master stations: 1 Remote I/O stations: 64)
2
Overall distance 30 km
Distance
between
stations
3
25 Mbps —
SI optical cable : 200m
H-PCF optical cable : 400m
Broad-band H-PCF
optical cable : 1km
QSI optical cable : 1km
—
10 Mbps
SI optical
cable :
500m
H-PCF
optical cable :
1km
Broad-
band H-PCF
optical cable :
1km
QSI
optical cable :
1km
GI-50/125
optical cable
: 2km
GI-62.5/125
optical cable :
2km
SI optical cable: 500m
H-PCF optical cable:
1km
Broad-band H-PCF optical cable:
1km
QSI optical cable: 1km
GI-50/125
optical cable :
2km
GI-62.5/125
optical cable :
2km
Network cable Optical fiber cable (procured by a user)
3
Applicable connectors 2-core optical connector plug (procured by a user)
Maximum number of networks 239 (Total including PLC to PLC networks)
Transmission path format Duplex loop
Communication method Token ring
Synchronization method Frame synchronization
Coding method NRZI code (Non Return to Zero Inverted)
Transmission format HDCL standards (Frame format)
Error control CRC (X
16
+ X
12
+ X
5
+ 1) and retry by timeover
RAS functions
• Loop-back function due to error detection or broken cable
• Diagnostic function for checking local link lines
• Detection using link special relays or link special registers
• Backup of power supply on a remote I/O station
• Online module change in a remote I/O station
Application function • Remote password for remote I/O station
Transient transmission
• 1:1 communication (Monitor, program upload/download, etc.)
• Various send/receive commands from the programmable controller program (READ/WRITE,REMFR/REMTO)
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