4/20
Schneider Electric
4
The hot standby option provides Quantum series CPUs with the high dependability
that security-critical applications demand. Central to the system is a standby
controller–a second Quantum system configured identically with the primary control
system with special hot standby modules mounted in both backplanes. The standby
controller uses a high-speed fiber optic link to constantly maintain the current system
status of the primary controller. In the event of an unexpected failure in the primary
controller, system control automatically switches over to the standby controller.
Critical processes running on a remote I/O network remain intact, unaffected by
controller hardware failures. The result is higher productivity with reduced
down-time.
At the beginning of every primary controller scan, the current register and I/O state
table is transferred to the standby controller across a secure, high-speed fiber optic
link. If switchover is triggered, the standby controller takes control of the system with
up-to-date I/O and register status for a bumpless, controlled transfer with minimal
process impact. At switchover, the standby controller becomes the primary controller
and, when the downed controller is restored to good health, it becomes the standby.
Most applications demand that identical logic programs reside in the two controllers.
User logic comparisons between the two controllers are performed at startup and
during runtime. By default, the standby controller is taken offline if a logic mismatch
is detected. You have the option to allow logic mismatches to coexist for high
availability during maintenance periods. If minor process changes are required, you
can make them without disturbing standby operations.
In the event that the standby controller does not have the application program, it can
be copied from the primary controller. Copying the program is a simple two-step
procedure that uses the keyswitch and update button on the front of the standby
controller. This task can be accomplished by a maintenance person without the use
of a programming panel.
For ease of ordering and installation, Schneider offers three preconfigured kits for hot
standby applications. The 140 CHS 210 00 kit for open configuration includes all the
products necessary to add the hot standby to an existing system. The other two kits,
140 CHS 410 10 and 140 CHS 410 20, contain hot standby, backplanes, power
supplies, and Quantum controllers, so you can easily build a hot standby system
from the ground up.
The Hot Standby module 140 CHS 110 00 comprises on the front panel:
1 Model number and color code.
2 LED array.
Ready (green) - module has completed start-up diagnostics (blinks to indicate
transmission errors).
Com Act (green) - communicating with I/O bus (blinks to indicate transmission
errors).
Primary (green) - module controls the process.
Com Err (red) - indicates transmission errors, or connection interrupted.
Standby (amber) - module in standby mode; blinks during the update process.
3 Removable, hinged door and customer identification label.
4 Selector switches.
5 Micro switch.
6 Update pushbutton.
7 Fiber optic transmit cable connector.
8 Fiber optic receive cable connector.
Presentation
Description
1
2
3
8
7
6
5
4
Quantum automation platform 4
Hot standby modules
Presentation,
description
0
(373 páginas)
Manymanuals.com
Manymanuals.de
Manymanuals.fr
Manymanuals.it
Manymanuals.pl
Manymanuals.cz
Manymanuals.es
Manymanuals-pt.com
Comentários a estes Manuais