Emerson Process Management ControlWave EFM 3808 - Manual (Page 127)

CI-ControlWave EFM Service / 3-11
3.4.1 Extent of Field Repairs
Field repairs to a ControlWave EFM are strictly limited to the replacement of complete
modules. Component replacement on a ControlWave EFM Module constitutes tampering
and will violate the warranty. Defective ControlWave EFM Housings or Modules must be
returned to Bristol Inc. for authorized service.
3.4.2 Disconnecting RAM Battery
The ControlWave EFM’s Lithium RAM battery cannot be replaced while power is on.
Once the RAM battery has been replaced, the unit will still execute its FLASH-based
application load (Boot Project) upon power-up, but all of the current process data will have
been lost. Upon power-up, the unit will act as though it had just been booted and it will
revert back to the initial values specified in its application load. The battery may be
disabled by removing CPU Module Battery Backup Board Jumper, JP1.
3.4.3 Maintaining Backup Files
It is essential to maintain a backup disk of each application load file to guard against an
accidental loss of process configuration data. Without a backup record, it will be necessary
to reconfigure the entire application load; that can be a very time consuming procedure.
Always play it safe and keep backup copies of your operating system loads. A copy of the
application load can be loaded into ControlWave EFM FLASH memory and/or saved to a
PC’s Hard Drive as a ZIP file.
3.5 WINDIAG DIAGNOSTICS
Bristol’s WINDIAG Software is a diagnostic tool used for testing ControlWave EFM I/O
Modules, CPU memory, communications ports, etc., for proper performance. The
ControlWave EFM must be communicating with a PC equipped with the WINDIAG
program. CPU Module configuration switch SW2-8 must be set to the OFF (Closed) position
to enable diagnostics. Communication between the ControlWave EFM (with/without
application loaded) and the PC can be made via a Local or Network Port with the following
restrictions:
• CPU Board Switch SW2-8 must be OFF to run the WINDIAG program. Setting SW2-8
OFF will prevent the ‘Boot Project’ from running and will place the unit into diagnostic
mode.
• Any ControlWave EFM communication port can be connected to the PC (PEI) provided
their port speeds match. Most PCs have a COM1 port (typically RS-232 and defaulted to
9600 bps operation).
• Setting CPU Board Switches SW2-3 and SW2-8 OFF prevents the ‘Boot Project’ from
running, places the unit into diagnostic mode and forces communication ports COM1,
COM2, COM3, COM4, COM5, COM8 and COM9 to operate at 9600 baud.
COM1: From the factory, RS-232 Communications Port COM1 defaults to 115.2 kbd (RS-
232) using the Internet Point to Point Protocol (PPP). Note: Port COM1 will be
configured for RS-232 operation (at 9600 baud) by setting CPU Switches SW2-3
and SW2-8 OFF. This will prevent the boot project from running and places the
unit into diagnostic mode. To test COM1 using the WINDIAG program, it must not
otherwise be in use and CPU Switch SW2-8 must be set OFF. Connection to a PC
requires the use of an RS-232 “Null Modem” cable (see Figure 2-12).