Crestron Electronics CP4N - 4-Series Architecture; Memory and Directory Structure

Product Manual — Doc. 8559B 4-Series™ Control Systems • 149
4-Series Architecture
The following sections provide an overview of the architecture of a 4-Series control system.
Memory and Directory Structure
A 4-Series processor has between 1GB and 2GB of built-in SDRAM (synchronous DRAM) volatile
memory. For more information regarding the memory specifications for each 4-Series control
system model, refer to Features (on page2).
The file system inside the 4-Series control engine is contained within Flash memory. The 4-Series
processor also has 128kB of NVRAM (nonvolatile RAM). NVRAM contains program variables that
are retained after the loss of electrical power, while volatile memory is lost.
Flash Memory
Flash memory for a 4-Series control system contains the following components:
l
Operating system (.puf file)
l
SIMPL and SIMPL# Pro programs
l
SIMPL+® programming modules
The files that reside in flash memory conform to a flat directory structure. The following table
details the overall file system as shown over SNTP. The internal file path is also provided where
applicable.
NOTE:Directory names are case-sensitive on 4-Series control systems.
4-Series Control System Directory Structure
SFTPFile Path Internal File Path Description
\auditlog (N/Ap) Contains the output of the audit log files
\autoupdatelogs \sys\AutoUpdate\Logs Contains the output of the autoupdate log files
\cert \romdisk\user\cert Contains any user certificates loaded to the
control system
\firmware \romdisk\user\system Contains firmware files (PUFor ZIP) loaded to
the control system
\html \html Contains web pages
\nvram \nvram The NVRAMlegacy directory
\plog \logs Contains the output of the persistent log (PLOG)
files
\rm, \rm2 \rm, \rm2 Amounting point for external removal media