2
- 2
2.1 System Configuration
2
SYSTEM CONFIGURATION
(1) Redundant System
(a) System Configuration
A redundant system consists of two sets of power supply modules, CPU modules,
main base units, and network modules.
To configure a redundant system, prepare two sets of systems, i.e., mount the
same model of power supply module, CPU module, and network module on each
main base unit, then connect the CPU modules of both systems with a tracking
cable.
The connection direction (connectors) of the tracking cable determines which one
is system A or B.
(
If system A and system B are started up simultaneously, system A becomes the
control system.
If one of the systems is started up before the other, the system started up first
becomes the control system.
*1
(
POINT
The extension base unit cannot be connected to the main base unit where the
Redundant CPU whose first 5 digits of serial No. is "09011" or earlier is mounted.
If connected, a stop error "BASE LAY ERROR (error code: 2010)" occurs.
When connecting the extension base unit, use the Redundant CPU whose first 5
digits of serial No. is "09012" or later.
* 1 : If system A and system B are started up within three seconds of one another, system A becomes
the control system.
Diagram 2.2 Redundant System Configuration
Q38B
Install a module with the
same module name into
the same slot.
System A -
Control System
System B -
Standby System
Q38B
Q61P
Q12PRHCPU
QJ71LP21
QJ71GP21-SX
QJ61BT11N
Tracking cable
QJ71E71
QJ71PB92V
