Mitsubishi Electric Melsec A Series - Page 34

INTRODUCTION
1 - 17
1
(c) Coaxial loop system
(2) Remote I/O network
Pay attention to the following common precautions when replacing remote I/O networks.
1) Modules for remote I/O of the CPU module on each master station
(a) When the Q series CPU module on the master station is used
On the remote I/O network, the MELSECNET/H module and MELSECNET/10 module for A/
AnS/QnA/QnAS series cannot be used in combination. When the master station is replaced
with the Q series modules, replace all remote I/O station with the MELSECNET/H module for
the Q series.
(b) When the AnU(S)/QnA(S) series CPU module on the master station is used
On the remote I/O network, the MELSECNET/H module for the Q series and MELSECNET/10
module for the A/AnS/QnA/QnAS series can be used in combination using MELSECNET/10
mode.
: Connection allowed, ×: Connection not allowed
*1 Modules with a serial number (first five digits) of "15012" or later
1) When replacing a multiplex master system, select Q12PHCPU, Q25PHCPU, Q12PRHCPU, or
Q25PRHCPU as the CPU module.
2) When replacing a parallel master system, build a separate network having a different network No.
MELSECNET/10 MELSECNET/H System configuration precautions
Coaxial loop
Coaxial bus
The following item is provided in addition
to common precautions (1) described on
the previous page.
• Overall distance: If this value exceeds
the Q series specification value when
the MELSECNET/10 system cables are
re-used, measures (e.g. adding a
repeater unit) are required.
• Number of stations: When 64 modules
are connected, measures (e.g. dividing
into two or three networks of 32 modules
or less having a different network No.)
are required.
• Duplex loop: When the transmission
path has to be duplexed, changes to an
optical loop system, etc. are required.
Common precautions
Remote I/O station
Remote master station
MELSECNET/10 module
for A/AnS/QnA/QnAS series
MELSECNET/H module
for Q series
AnU(S)/QnA(S)CPU
+
MELSECNET/10 module
for A/AnS/QnA/QnAS series
*1
(MELSECNET/10 mode)
Q series CPU module
+
MELSECNET/H module for Q series
×
(MELSECNET/H mode)
Network 1 1NS41NS2
1M
P1
1N
S3
1MP1
1NS2 1NS41NS3
Network 1