Hitachi LQZ700, Руководство пользователя

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1 SPECIFICATIONS
1-2
1.1 Overview
The SYS SW module (model: LQZ700) is a system changeover module to implement a multi-LPU
(simplified duplex) configuration by connecting between two R70 units or S10V units by this
module.
A standby duplex system for each unit is configured, and the running system is changed over to the
standby system when a fault occurs in the running system.
This changeover is performed by the following causes.
z The PCs OK signal of the LPU has changed from the “ON” status into the “OFF” status.
z The PI/O output “PI/O OK” of the LPU has changed from the “ON” status into the “OFF” status.
This module (LQZ700) is not available for the CPU unit of the S10mini series.
The following figure shows a system configuration.
Figure 1-1 System Configuration
PS LPU
SYS
SW
module
R70 unit of system A
PS LPU
R70 unit of system B
PS ST
PI/O
PI/O unit
RI/O line
Option Option
SYS
SW
module