Mitsubishi Electric A1SJ71AP23Q User Manual page 22

(2) Performance specifications of MELSECNET data link system and
A1SJ71AR23Q
Table 2.2 Performance specifications of MELSECNET data link system and A1SJ71AR23Q
Item
Maximum
Input (X)
applicable link
points per
Output (Y)
station
B
Maximum link
points in a
system
W
Master
station
Maximum link
Local station
points per
station
Remote I/O
station
Communication speed
Communication method
Synchronization method
Transmission path
Overall cable distance
Number of connected
stations
Modulation method
Transmission format
Error control system
RAS function
MELSECNET data link system
MELSECNET
mode
Up to the maximum number of I/O points for the CPU module
used in the master station is applicable.
(The total number of link points for slave station is equal to the
number of link using points for the master station)
1024 points
(128 byte)
1024 points
(2048 byte)
1024 byte
512 byte
Number of I/O
points: 512 points
1.25Mbps
Half duplex bit serial method
Frame synchronization method
Duplex loop
Up to 10km (Station-to-station 500m)
Up to 65 (Master station: 1, The total number of local stations
and remote I/O stations: 64)
CMI method
Conforming to HDLC (Frame format)
Retries due to CRC (generating polynomial X
time out
• Loopback function due to error detection and cable break
• Diagnostic function including link line check of host station
etc.
5
Specifications
MELSECNET II
mode
4096 points (512 byte)
4096 points (8192 byte)
1024 byte (First half of link parameters)
1024 byte (Latter half of link parameters)
-
MELSECNET II
composite mode
512 byte
Number of I/O
points: 512 points
16 12 5
+X +X +1) and