CLS200 Series User’s Guide
Chapter 8: Troubleshooting and Reconfiguring
150
User-Written Software
You can request a communications specification from Watlow if you want to write your own
software. Watlow will answer technical questions that arise during your software development
process, but does not otherwise support user-developed or third-party software in
any way.
NO-Key Reset
Performing a
NO
-key reset returns all controller settings to their defaults. All recipes are also cleared.
To perform a
NO
-key reset:
1. Make a record of the controller’s settings.
2. Turn off power to the unit.
3. Press and hold the
NO
key on the keypad.
4. Turn on power to the controller still holding the
NO
key.
5. When prompted
RESET WITH DEFAULTS?
, release the
NO
key and press the
YES
key.
6. If you do not see the
RESET WITH DEFAULTS?
prompt or do not get a chance to press
YES
, repeat the procedure.
7. Restore the controller settings.
Replacing the EPROM
Replacing the EPROM involves minor mechanical disassembly and reassembly of the controller. You
will need a Phillips screwdriver and an IC extraction tool or a small, standard, jeweler’s screwdriver.
CAUTION!
The EPROM and other components are sensitive to damage from
electrostatic discharge (ESD). To prevent ESD damage, use an ESD wrist strap or other
antistatic device.
NOTE!
Replacing the EPROM with another version results in full erasure of RAM. Make a
record of all parameters before changing the EPROM.
1. Make a record of the controller’s settings.
2. Power down the controller.
3. Remove the four screws from the sides of the controller front panel.
4. Remove the electronics assembly from the case, as shown in
Figure 8.1
.
