Emerson Process Management ControlWave EFM 3808 - Manual (Page 132)

3-16 / Service CI-ControlWave EFM
3. Click on RUN button next to External loop-back.

Test responses:
a) Success - All sections of test passed
b) Failure - TXD RXD Failure or CTS RTS Failure

Execution time < 5 sec.
3.6 CORE UPDUMP
In some cases a copy of the contents of SRAM and SDRAM can be uploaded to a PC for
evaluation by Bristol Inc. engineers. This upload is referred to as a ‘Core Updump.’ A Core
Updump may be required if the ControlWave EFM electronic flow meter repeatedly enters
a ‘Watchdog State’ thus ill effecting system operation. A Watchdog State is entered when
the system crashes, i.e., a CPU timeout occurs due to improper software operation, a
firmware glitch, etc. In some cases the Watchdog State may reoccur but may not be
logically reproduced.
‘Crash Blocks’ (a function of firmware provided for watchdog troubleshooting) are stored in
CPU RAM. The user can view and save the ‘Crash Blocks’ by viewing the Crash Block
Statistic Web Page (see Chapter 4 of the Open BSI Technician’s Toolkit - D5087). Crash
Block files should be forwarded to Bristol Inc. for evaluation. If additional information is
required to evaluate the condition, a Core Updump may be requested by Bristol. Once the
file generated by the Core Updump has been forwarded to Bristol it will be evaluated and
the results will be provided to the user.
Follow the five steps below to perform a Core Updump.
1. Set CPU Module Switch SW2-1 OFF (Disable Watchdog Timer). If SW2-4 is ON, set it to
OFF (Enable Core Updump). Note: The factory default setting for SW2-4 is OFF.
2. Wait for the error condition (typically 3F on SCM Status LEDs).
3. Connect ControlWave EFM Comm. Port 1 to a PC using a Null Modem Cable (see
Figures 2-12 and 2-13).
4. Set the System Controller’s Mode Switch (SW1) so that both switches are in the OPEN
(Right) position or the CLOSED (Left) position.
5. Start the PC’s HyperTerminal Program (at 115.2kbaud) and generate a file using the
1KX-Modem protocol. Save the resulting Core Updump in a file to be forwarded to
Bristol, Inc. for evaluation.
By setting CPU Module Switches SW2-1 OFF and SW2-4 OFF prior to the failure of a
ControlWave EFM, it will not recover but will wait for the Core Updump to be taken. Once
the Core Updump has completed, set the ControlWave EFM CPU Module’s switch SW2-1
ON (Watchdog Enabled) and SW2-4 OFF (Core Updump Enabled) and the SCM’s Mode
Switch positions SW1-1 OPEN (right) and SW1-2 CLOSED (Left), i.e., for Local Mode, if
required, and then power cycle the unit to recover and start running again.
3.7 CALIBRATION CHECKS
Calibration of the MVT and the RTD are performed using OpenBSI’s TechView Program
(see document # D5131 – TechView User’s Guide).