QTech Data Systems DNP3 RTU - Manual (Page 9)

DATRAN XL4 RTU – Owners Manual – v1.1 June 2012
www.qtech.co.nz Page 9
Functional Description Functional Description Functional Description Functional Description
Central Processor Core Central Processor Core Central Processor Core Central Processor Core
The Q04 ARM Processor Module is based around industry standard 32 bit ARM Micro-controller architecture.
The ARM processor is an NXP LPC2468 microcontroller implemented on a four layer printed circuit board running
at a clock frequency of 72MHz with fully implemented 32 bit address and data busses. The ARM processor has 96
kBytes of SRAM used exclusively by the integrated processor peripherals and core functions. Operating firmware
is stored in the ARM processor’s 512 kBytes of Flash.
Memory Memory Memory Memory
The Q04 ARM Processor Module has the following memory:
•
16 MBytes of high speed volatile Dynamic Memory used for program data storage.
• 4 Mbytes of non-volatile NOR Flash Memory used for DLP and Data Logging Data storage.
• 8 Kbytes of Non-volatile RAM used for system configuration data storage.
Rea Rea Rea Real Time Clock l Time Clock l Time Clock l Time Clock
The real time clock chip provides system day of the week, day of month, month, year, time in 12 or 24 hours format
and am:pm. The real time clock is battery backed up to maintain its’ operation during power down. An inbuilt
software algorithm that provides accurate time keeping compensates for real time clock time drift.
A jumper labelled “BAT” on the module is provided to disable the real time clock battery backup function. This
allows the battery to be disconnected and preserved during long term storage of the module. This jumper is closed
for normal operation, open for long term storage.
System Reset System Reset System Reset System Reset
The system reset circuitry ensures proper and reliable operation of the processor during power failure and power
brown-outs. A system watchdog function provides protection and ensures re-starting of an out of step central
processor. The Q04 ARM Processor does not include an externally accessible reset switch like the Q03
Processor. If the module needs to be manually reset, simply remove the power for a few seconds and then
reconnect it.
Module Address Module Address Module Address Module Address
The Q04 ARM Processor Module Address is set by using “QTech Workbench”. The Q04 ARM Processor does not
have a DIP Switch setting like the Q03 Processor.
Factory Default Jumper Factory Default Jumper Factory Default Jumper Factory Default Jumper
During normal operation the Factory Default Jumper, labelled “INIT” should not be installed. Whenever the Factory
Default Jumper is installed and the Q04 ARM Processor Module is repowered, then, a set of default configuration
parameters is loaded into the Q04 ARM Processor. The jumper must be then removed for normal operation.
Q04 Q04 Q04 Q04 Status LEDs Status LEDs Status LEDs Status LEDs
The status of the Q04 is displayed on 5 LEDs. The function of these LEDs is detailed below:
PWR This is a blue LED that shows that power is applied to the Q04 Processor.
OK This is a green LED that shows the status of the central processing unit. The LED blinks slowly when the
CPU is functioning correctly. The LED blinks 6 times quickly whenever a system reset has occurred. Any
other condition of this LED indicates a malfunction of the CPU.
MSG This orange LED is unused but may be used for diagnostics or other indicator purposes in future versions
of the firmware.
A1 This orange LED is unused but may be used for diagnostics or other indicator purposes in future versions
of the firmware.
B1 This orange LED is unused but may be used for diagnostics or other indicator purposes in future versions
of the firmware.