Instruction manual

ControlWave Micro Instruction Manual (CI-ControlWave Micro)
5-8 Service & Troubleshooting Revised Jun-2013
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 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.
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).
The procedure for replacing the battery varies slightly depending upon
the type of battery holder – snap type or clip type.
Removing /
Replacing the
Battery – Snap
Type Holder
Battery Part
Numbers:
CR2032
DL2032
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, insert the tip of a small flat head
screw driver into the gap between the battery and the holder. (The
gap is on the side of the holder that doesn’t have the inner clip
against the battery.) Gently push the screwdriver at an angle
underneath the battery and it will pop out of the holder.
5. To install the replacement battery, press one side of the battery
against the inner clip of the holder then press the battery down into
the slot so it snaps in.
6. Replace the CPU module in slot 2 of the housing.
7. Re-connect power to the ControlWave Micro.
8. 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.
Gap between
battery and holder
Inner clip