Mitsubishi Electric Melsec Q Series User Manual page 33

2
SYSTEM CONFIGURATION
(2) Network configuration
To use the QJ71PB92V in a redundant PROFIBUS-DP system configuration, the
following conditions must be met:
(a) Mounting the QJ71PB92V on a main base unit
(b) Mounting the QJ71PB92V on an extension base unit
1) Number of connectable modules in an entire network (When repeaters are
used)
Control system QJ71PB92V + Standby system QJ71PB92V + DP-Slaves
* 1 * 2
126
<
* 1 Up to 124 DP-Slaves are connectable.
* 2 A redundant DP-Slave may have two FDL addresses (for control and standby systems).
If all of the DP-Slaves are this type, the number of connectable DP-Slaves is 62.
2) Number of connectable modules per segment
Control system QJ71PB92V + Standby system QJ71PB92V + DP-Slaves +
* 1
Repeaters 32
<
* 1 A repeater are counted for both segments.
3) Max. no. of repeaters
Up to 3 repeaters can be used for communication between the QJ71PB92V
and any DP-Slave.
4) Number of connectable DP-Slaves per QJ71PB92V
Up to 124 DP-Slaves can be connected to a single QJ71PB92V.
The conditions of when the QJ71PB92V is mounted on an extension base unit are
the same as those of when the module is used in a single CPU system or multiple
CPU system. ( Section 2.2.1)
2.3 Redundant System Configuration (Redundant CPUs Only)
2.3.1 PROFIBUS-DP network configuration
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