User's Manual

545C Operations Manual

02/10/2012 Prerelease DCN 00001789-A

5.2.1 Configuring the MCC-545C

Configuration parameters include the unit ID, the Master Station

assignment, I/O port functions and baud rates, transmit and receive

parameters and network parameters. Parameters or operational states set

by these commands are retained and will determine the way in which the

MCC-545C will interact with other equipment at the site and with the

communications network.

Most configuration parameters can be viewed with the CONFIG, ASSIGN,

SNP, and CR10X commands. You should use these commands to verify that

the configuration is correct. If it is not correct, use the appropriate

command(s) to correct the configuration, and then enter the SAVE

command to write the configuration parameters into the Configuration

Parameter Memory (CPM) for non-volatile storage.

The software normally executes using the data and parameters stored in

RAM. When the unit is turned off, or power is disconnected, the RAM

information will be maintained by battery backup. When main power is

restored the unit continues operation from RAM. When this happens, you

will see the following message on the Operator Port. (See Section 3.3 for

details.)

POWER SHUTDOWN/FAIL OCCURRED

POWER HAS BEEN RESTORED... RESUMING OPERATION

The RAM contents will be lost under the following conditions:

• The boot command is issued.

• The Reset button (SW1) is pressed.

• The internal battery backup is disconnected.

• The internal battery fails or is discharged.

• The software crashes and restarts.

The software will detect these events and will then recopy the

configuration values from CPM back into RAM when operation is resumed.

The software will revert to the factory settings contained in the PM if the

contents of the CPM become invalid.