RAD Data comm LRS-24 - Manual (Page 70)

Chapter 4 Management via the CM-2 Module LRS-24 Installation and Operation Manual
4-6 Hardware Requirements
Modules without Internal Agent
The CM-2 module will store configuration data locally for modules where such
data is provided by an external management function. Therefore, special
arrangements are needed to enable the provision of the configuration parameters
for each individual module:
• Power-up – upon power-up, the goal is to restore the last operational
configuration automatically and reliably. For this purpose, the CM-2 module
analyzes the configuration parameters stored in the local module, in the
remote module connected in a link with the local module, and also its own
configuration data associated with the module:
− If the parameters in the local and remote equipment are identical and
valid (valid means that all the parameters are consistent and within the
allowed ranges), these parameters are automatically copied to the CM-2
data base, and used as the operational parameters.
− If the parameters of the local and remote modules differ, or invalid
parameters are detected in at least one of them, but valid parameters are
stored in the CM-2 data base, these parameters are automatically
downloaded to the equipment and used to determine the operational
configuration after power-up.
− If the CM-2 module has been powered off, its configuration data is no
longer considered valid. In this case the operator is prompted to
reconfigure the equipment parameters.
• Replacement of CM-2 module – the procedure explained above is also used
if a CM-2 module is plugged into an operating system.
• Replacement of local module or remote equipment – the appropriate
parameters are automatically downloaded from the CM-2 database. If the
CM-2 database is not valid, the operator must determine the desired
configuration.
4.2 Hardware Requirements
Terminal Characteristics
Any standard ASCII terminal (“dumb” terminal or personal computer emulating an
ASCII terminal) equipped with an RS-232 communication interface can be used to
perform the preliminary configuration and manage an LRS-24 equipped with the
CM-2 module.
The software used to operate the supervision program is contained in the CM-2
module. Moreover, the CM-2 module stores all the configuration information
generated or altered during the communication with the terminal: no information
is stored in the terminal.
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