Mitsubishi Electric Melsec A Series - Page 19

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INTRODUCTION
1
(1) Optical cable system
(a) 2-tier system 1: System configuration example using local stations only
*1 As the transmission speed of MELSECNET/H is faster than that of MELSECNET(II), the distance between stations may
become shorter.
(b) 2-tier system 2: System configuration example using remote I/O stations only
*1 As the transmission speed of MELSECNET/H is faster than that of MELSECNET(II), the distance between stations may
become shorter.
MELSECNET( II ) MELSECNET/H System configuration precautions
Optical loop Optical loop
1) Distance between stations: If this value
exceed the Q series specification values
when re-using the MELSECNET(II)
system cables, optical cables, etc. has to
be changed.
*1
2) CPU: When replacing from an integrated
type CPU, one new slot (32 points) is
required.
3) Number of stations: When 65 modules
are connected, measures (e.g. dividing
into two networks of 64 modules or less
having a different network No.) are
required.
MELSECNET( II ) MELSECNET/H System configuration precautions
Optical loop Optical loop
1) Distance between stations: If this value
exceed the Q series specification values
when re-using the MELSECNET(II)
system cables, optical cables, etc. has to
be changed.
*1
2) CPU: When replacing from an integrated
type CPU, one new slot (32 points) is
required.
L3L1
M
L2
Network 1 1NS31NS1
1M
P4
1N
S2
R3R1
M
R2
Network 1 1R31R1
1M
R
1R2