TransCore 0596465PT15 Manuel D’Utilisation
General Software Information
5-5
Operating Parameters
The Encompass 4H Readers maintain their operating parameters in non-volatile mem-
ory (NVRAM) so that the parameters are preserved after a power-down sequence.
ory (NVRAM) so that the parameters are preserved after a power-down sequence.
Caution
To save user parameter changes to NVRAM, you must send command #00 before
powering down the reader.
To save user parameter changes to NVRAM, you must send command #00 before
powering down the reader.
Power Fail
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.
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
Program download stores the Encompass 4H applications software into the reader’s
flash memory. Program download is used to install program upgrades, add features,
and to recover from corrupted program data.
flash memory. Program download is used to install program upgrades, add features,
and to recover from corrupted program data.
Note: Program download is a hosted process. Exercise caution so that you don’t inad-
vertently enter download mode.
vertently enter download mode.
Download Considerations
You should consider the following factors when performing program download:
•
The Encompass 4H Reader does not process tags while in download mode.
•
The Encompass 4H 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 two seconds.
erase of flash memory has been performed before transmitting the data. Erasing
the flash memory typically takes two seconds.
•
Exiting from download mode re-executes startup. If the new software has been
loaded without errors, the Encompass 4H Reader comes up in data mode. If a
flash checksum error is detected, the Encompass 4H Reader reenters download
mode and transmits a sign-on message with a boot version of 0.00x and without a
serial number.
loaded without errors, the Encompass 4H Reader comes up in data mode. If a
flash checksum error is detected, the Encompass 4H Reader reenters download
mode and transmits a sign-on message with a boot version of 0.00x and without a
serial number.
Note: The Encompass 4H Reader uses default communications parameters when
operating in download mode
operating in download mode
–
38400 baud, 8 data bits, 1 stop bit, no parity, basic
protocol
–
and does not echo commands.