Chapter 5: Subsystem Maintenance
Subsystem Maintenance
5-3
5.2 Replacing Controller Module Components
The controller module in the A16F-R2422 consists of the following
replaceable components:
•
DDR RAM DIMM module
•
Controller module
If any of these components fails, it needs to be replaced. To replace any of
these components, the controller module must be removed. The controller
modules in the A16F-R2422 are redundant and hot-swappable.
5.2.1 Controller Module Maintenance Overview
•
The controller module contains a DDR RAM DIMM module. When
replacing the controller module, the DIMM module must be removed
from the old controller module and reinstalled onto the new controller
module.
•
When replacing the controller module, always remember that the
controller board is one of the most sensitive components in the A16F-
R2422. All previously stipulated safety precautions (see
Section 2.3
)
must be strictly adhered to. Failure to adhere to these precautions can
result in permanent damage to the controller board, resulting in lengthy
delays for the end user.
•
When A16F-R2422 operates in dual-redundant mode, if one (1)
controller fails, a transparent failover to the partner controller will
ensure the continued smooth operation of the controller head. When the
failed controller is replaced, a transparent failback will ensure that the
I/O workload is once again distributed between the two controllers.
WARNING!
Controller module can be replaced online only when the A16F-R2422 is
operating in dual-redundant mode.
5.2.2 Removing the Controller Module
To remove the controller module:
Step 1.
Disconnect all cables
from the controller module. These include the
Ethernet cable connected to the Ethernet port, and any cables
connected to the COM ports.
