Operations Manual

OPERATIONS 4-5
O&M of the MCC-545B PACKET DATA RADIO
12/2000
3. If the contents of the EEPROM is invalid - possibly because of EEPROM failure,
software version in PROM is changed or and image has never been written to EEPROM,
then the software will revert to the factory settings contained in the PROM.
The user should beware that it is possible to "get in trouble" with this configuration process. For
example, assume you accidentally set the protocol for the operator port to MSC. If you do not
have the ability to interface using MSC protocol you will immediately lose contact with the
545B. You can no longer issue commands. Power cycling will not help because your change is
retained in RAM and lives through power cycling. However, in this case you can recover by
removing the lid on the 545B and pressing and releasing the Reset button (S1). The software will
reboot and restore the EEPROM settings.
As a variation, assume you want to change the operator port to MSC. You connect in ASCII
protocol, command the change to MSC protocol, then switch you PC to also use MSC protocol.
Operation resumes and you are happy. But do not forget to do a save - or if the software ever
reboots, its back to ASCII. And remember that once you do the save you are committed to MSC
protocol. The reset button now reboots to MSC. There is no easy way back to the factory
defaults. You will need an MSC capability to command a change back to ASCII.
4.2.2 Selecting 545B Remote/Master Operation
The 545B can operate as either a Remote Station or as a limited Master Station. Use the
DEVICE command to select the mode you need.
For normal 545B Remote operation, enter:
DEVICE,REMOTE
For 545B operation as a limited Master Station, enter:
DEVICE,MASTER
NOTE
Additional 545B commands are available when DEVICE,MASTER is selected (No help for this
command).
4.2.3 Selecting Network Parameters
MCC recommends using the given default network parameters (values set on power-up or after
reset). If you choose to change these parameters, first review the discussion here and in Section
4.8.5 and then use the following command to change the desired settings:
SNP{,pname,value}