Instruction manual

ControlWave Micro Instruction Manual (CI-ControlWave Micro)
means you should not need to replace a battery until the
ControlWave Micro has been in service for an extended period
(normally many years).
The CPU module accommodates a 3 V, 300 mA lithium coin cell
backup battery housed in a coin-cell socket (S1). A supervisory circuit
on the CPU switches to battery power when the regulated 3.3 Vdc falls
out of specification. The battery then provides backup power for the
real-time clock (RTC) and the system SRAM on the CPU module.
Caution
You lose SRAM contents when you remove the backup battery or the
daughterboard where it resides.
If you replace a backup battery, wait at least one minute before re-
powering the system. This enables the SRAM to completely discharge.
After you install the new battery, ensure that you have placed jumper
JP8 on pins 1-2 (to enable the battery).
Removing /
Replacing the
Battery
1. If the Micro is running, place any critical control processes under
manual control.
2. Remove power from the ControlWave Micro.
3. Remove the CPU module from the housing.
4. To remove the lithium battery, gently pry up the tab holding the
battery in the coin cell socket and remove the battery with a pair of
tweezers or needle-nosed pliers. Install the replacement battery.
5. Replace the CPU module in slot 2 of the housing.
6. Re-connect power to the ControlWave Micro.
7. Once the battery has been replaced, the unit executes its Flash-
based application (“boot project”) at power-up, but all of the
current process data is lost. At power-up, the Micro acts as though
it had just been booted and reverts back to the initial values
specified in its application.
5.2.7 Enabling / Disabling the Backup Battery
For maximum shelf life, the CPU module ships from the factory
with the installed lithium backup battery disabled. You must enable
it when you install the CPU module.
Enabling
To enable the battery, install jumper JP8 on pins 1-2.
Disabling
For maximum shelf life, you can isolate the battery from the circuit by
placing jumper JP8 on pins 2-3.
5-8 Service & Troubleshooting Revised May-2011