Micromod Micro-DCI: 53SL5100A Single Loop Controller - Manual (Page 123)

Single Loop Process Controller Instruction Manual
Maintenance 115
12.4 Error and Hardware Malfunction Messages
Error Messages:
• LOGO - The controller is in the suspend state (also called FIX 0 because datapoint location
B00 = 0).
Hardware Malfunction Messages: ·
• Entire Display Flashes: The watchdog timer has timed out.
• CPU RAM FAILURE: IC U1 is bad.
• ROM CHKS FAILURE: IC U3 is bad.
12.5 Resetting the Controller
The controller can be reset either by either of these methods:
• Cycle the power.
- or -
• Carefully press the reset button by inserting a thin wire through the small hole in the upper left
corner of the front bezel.
When the controller restarts, it immediately checks to determine if any of the horizontal keypad push but-
tons are being pressed.
• If the F1 push button is pressed and held during controller reset, the controller enters a factory
test mode. To exit test mode, reset the controller again using the thin wire with no push
buttons pressed.
• If the F2 push button is pressed and held during controller reset, the controller database is set
to the defaulted values. (Also called FIX 98, because setting datapoint location B00 to 98
initiates the same operation.)
• If the F3 push button is pressed and held during controller reset, the controller is forced to the
suspend state (FIX 0).