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3.1 Performance Specifications
3
SPECIFICATIONS
CHAPTER3 SPECIFICATIONS
This chapter describes performance specifications and function list of a local module.
For general specifications, refer to the following manual.
User's manual for the CPU module used (Hardware Design, Maintenance and
Inspection)
3.1 Performance Specifications
This section describes the performance specifications of the MELSECNET or
MELSECNET/B data link system and the local module.
(1) Performance specifications of MELSECNET data link system and
A1SJ71AP23Q
* 1 Connecting an optical fiber cable with a connector requires professional skills and special tools.
Also, a connector dedicated to an optical fiber cable is required.
For purchase, contact your local Mitsubishi Electric System Service or representative.
Table 3.1 Performance specifications of MELSECNET data link system and A1SJ71AP23Q
Item
Specifications
MELSECNET data link system
MELSECNET mode MELSECNET II mode
MELSECNET II composite
mode
Maximum applicable
link points per station
Input (X) 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)
Output (Y)
Maximum link points
in a system
Link relay (B) 1024 points (128 byte) 4096 points (512 byte)
Link register
(W)
1024 points (2048 byte) 4096 points (8192 byte)
Maximum link points
per station
Master station
1024 byte
1024 byte (First half of link parameters)
1024 byte (Latter half of link parameters)
Local station
Remote I/O
station
512 byte
Number of I/O points: 512
points
-
512 byte
Number of I/O points: 512
points
Communication speed 1.25Mbps
Communication method Half duplex bit serial method
Synchronization method Frame synchronization method
Transmission path Duplex loop
Overall cable distance Up to 10km (Station-to-station 1km)
Number of connected stations Up to 65 (Master station: 1, The total number of local stations and remote I/O stations: 64)
Modulation method CMI method
Transmission format Conforming to HDLC (Frame format)
Error control system
Retries due to CRC (generating polynomial X
16
+ X
12
+ X
5
+1) and time out
RAS function
•Loopback function due to error detection and cable break
•Diagnostic function including link line check of host station etc.
Connector
2-core optical connector plug (User prepared
*1
)
Applicable cable
Optical fiber cable (User prepared
*1
)
Number of I/O occupied points 32 points (Intelli: 32 points)
Internal current consumption (5VDC) 0.33A
Weight 0.30kg