TransCore 05531 ユーザーズマニュアル

The Encompass 4/4800 Multiprotocol Readers maintain their operating parameters in 
non-volatile memory (NVRAM) so that the parameters are preserved after a power-
down sequence. 

The system maintains a power fail flag. The host transmits command #520 Display 
Power Fail Bit to determine if a power down has occurred. This flag is cleared by both 
command #63 Reset Reader and command #65 Reset Power Fail Bit.

Program download stores the Encompass 4/4800 Multiprotocol applications software 
into the Encompass 4/4800 Multiprotocol Reader’s flash memory. Program download 
is used to install program upgrades, add features, and to recover from corrupted pro-
gram data. The download mode supports a limited set of commands: #90 Load Pro-
gram Block, #91 Verify Flash Checksum, #96 Erase Flash Memory, #97 Perform 
Destructive Memory Test, and #99 Exit Download Mode.

You should consider the following factors when performing program download:

The Encompass 4/4800 Multiprotocol Reader does not process tags while in 
download mode.

The Encompass 4/4800 Multiprotocol Reader accepts only download commands 
while in download mode. It responds to all other commands with an e

rror 

mes-

sage.

The Encompass 4/4800 Multiprotocol Reader does not accept any program data 
unless a successful erase of flash memory has been performed before transmitting 
the data. Erasing the flash memory typically takes seven seconds.

Exiting from download mode re-executes startup. If the new software has been 
loaded without errors, the Encompass 4/4800 Multiprotocol Reader comes up in 
data mode. If a flash checksum error is detected, the Encompass 4/4800 Multipro-
tocol Reader reenters download mode and transmits a sign-on message with a 
boot version of 0.00x and without a serial number.

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