Specifications

App - 1
App.
APPENDIX
Appendix 1 Comparison of Network Module Specifications, and Compatibility
Appendix 1.1 Specification comparison list between MELSECNET/H mode and MELSECNET/10 mode
The MELSECNET/H supports both the MELSECNET/H mode (high
functionality/high-speed mode) and the MELSECNET/10 mode (functional
compatibility/performance compatibility mode), which are explained in this textbook.
When the MELSECNET/10 mode is used, it is easy to make connection with the
AnU/QnA corresponding MELSECNET/10. However, its specifications are different from
those of the MELSECNET/10 mode, as shown in the table below.
Specification comparison list between MELSECNET/H mode and MELSECNET/10 mode
MELSECNET/H network system
Selected mode
Specification item
MELSECNET/H mode MELSECNET/10 mode
Transmission type
Coaxial bus type/optical (SI) loop type
I/O (LX, LY)
8,192 points
Link relay (LB)
16,383 points 8,192 points
Maximum
number of link
points
Link register (LW)
16,383 points 8,192 points
Maximum number of link points per station LB + LW + LY 2,000 bytes
Transient transmission data size Maximum 1,920 bytes/frame Maximum 960 bytes/frame
Communication speed 25 Mbps/10 Mbps (from switch setting) 10 Mbps
Link scan time
[Communication speed 10 Mbps]
KB + (0.45
total number of stations) + (total number
of bytes used in the network
0.001) (ms)
KB + (0.75
total number of stations) + (total
number of bytes used in the network
0.001) (ms)
Transmission delay time
Sequence scan time of sending side
+ refresh time of sending side
+LS
1
+ sequence scan time of receiving side
2
+ refresh time of receiving side
Sequence scan time of sending side
+ refresh time of sending side
+ LS
2
+ sequence scan time of receiving side
2
+ refresh time of receiving side
Communication method Token bus method [coaxial bus type] / token ring method [optical loop type]
Overall distance
500 m (1640.5 ft.) (2.5 km (8202.5 ft.) : When 4 repeaters are connected) [coaxial bus type] / 30 km (98430
ft.) [optical loop type]
Distance between stations
500m (1640.5 ft.): 5C-2V [coaxial bus type]/1 km (3281 ft.) : When QSI/H-PCF/H-PCF cable is used [optical
loop type (Communication speed 10 Mbps)]
300 m (984.3 ft.) : 3C-2V 500 m (1640.5 ft.) : When SI cable is used
Maximum number of networks 239
Maximum number of groups 32 9
Maximum number of connected stations 32 stations (1: control station1, 31: normal stations) [coaxial bus type]/64 stations (1: control station, 63:
normal stations) [optical loop type]
Maximum number of modules installed per CPU Total of 4 modules
32 bits data guarantee Supported Not supported
Block guarantee per station Supported Not supported
Transient transmission function
N:N communication (monitor,
upload/download, etc.)
Supported
Number of data sending/receiving channels
Receive channels: 64
(up to 8 channels when used at the same time)
Send channels: 8
8 (fixed channels)
Compatible instructions (SEND, RECV, READ,
SREAD, WRITE, SWRITE, REQ, ZNRD,
ZNWR)
Available
RRUN, RSTOP, RTMRD, RTMWR instruction Available
RECVS instruction Available Not available
Low-speed cyclic transmission function Supported Not supported
Maximum number of refresh parameters that can
be set (excluding SB, SW)
64/module 3/module
Network connection
Applicable CPU
QCPU (Q mode)
QCPU (Q mode)
QCPU-A (A mode)
QnACPU
ACPU