GE Energy Services
68K System Monitor
User's Guide
SWM0023 1.00 2 General
3-64 Full Release
RZ - ZMODEM Download
Platform oCPM oD20
D20 Base oD20 ME
D20 Base oD20/200
CCU Base oD20/200 ME
CCU Base oD25
Description Use this command to download configuration and application data over the serial
port into RAM or FLASH. The 68K Monitor accepts a transfer of ZMODEM
binary data to the D25 initiated either by the D25 user or by the sending terminal.
When the transfer is complete, the DOWNLOAD command returns control to 68K
Monitor’s command line.
Application code download only works when:
• executing from the BootROM, and
• the monitor has erased the FLASH region.
While the command downloads the file, it recognizes the ZLIB format of the
compressed data and uncompresses it.
Syntax Below is usage and syntax information for this command
Command Format rz [/(Vlevel | Mtimeout | Ctimeout | Wwindow)]
Variables /Vlevel verbose level, which determines the level of
debug messages displayed (default is zero, any
non-zero value will activate debug messages).
/Mtimeout set receive message timeout to the user specified
value (the default is 2000 ms).
/Ctimeout set inter-character timeout to user specified value
(default is 500 ms).
/Wwindow set receiver window size to user specified value
(default is 1400 bytes).
Special
Considerations
Before the start of the download, the system must suspend all
non-protected process running in the system.
• If there are parameters on the command line, the monitor
assumes that the D25 initiated the download, and allows 20
seconds for the user to activate the software that will send
data to the D25.
• If there are no parameters, the monitor assumes that the
sending software initiated the download and it will not
provide a wait period.
The command “rz” is the standard prefix used by the
ZMODEM binary protocol to start a file transfer. A terminal
using this command can connect to the D25 Monitor and
simply start sending ZMODEM data without any further user
input to the D25.
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