RAD Data comm LRS-24 4.2 Hardware Requirements

Chapter 4 Management via the CM-2 Module LRS-24 Installation and Operation Manual

4-6 Hardware Requirements

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

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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