- Emerson Remote Terminal Unit Instruction Manual

CI-ControlWave Express Service / 3-9
Figure 3-5 - CPU/System Controller Board Field I/O Wiring Diagram
3.4.2 Disconnecting RAM Battery
The ControlWave Express RTU 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 (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. The battery may be disabled by placing
the CPU/System Controller Board’s Battery Backup Jumper (W3) onto Jumper Posts 2 and
3.
3.4.3 Maintaining Backup Files
It is essential to maintain a backup disk of each ControlWave project to guard against an
accidental loss of configuration data. Without a backup record, it will be necessary to
reconfigure the entire application; that can be a very time consuming procedure. Always
play it safe and keep backup copies of your applications. A copy of the application can be
loaded into ControlWave ExpressPAC FLASH memory and/or saved to a PC’s hard disk as
a compressed ZWT file.
3.5 WINDIAG DIAGNOSTICS
Bristol WINDIAG program provides menu-driven diagnostics that have been
designed to assist a technician or Process Engineer in troubleshooting the
various ControlWave Express circuits. For more detailed descriptions of
ControlWave Express Windows Diagnostics than those provided herein see
Document D4041A - Chapters 1 & 7C.
Bristol WINDIAG Software is a diagnostic tool used for testing ControlWave Express
electronics including, I/O circuitry, CPU memory, communications ports, etc., for proper
performance. The ControlWave Express must be communicating with a PC equipped with
the WINDIAG program. CPU/System Controller Board configuration switch SW2-8 must be
set to the OFF (Closed) position to enable diagnostics. Communication between the
ControlWave Express (with/without application loaded) and the PC can be made via a Local
or Network Port with the following restrictions:
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