User Guide

The error detection for dead loops is performed by watchdog

(see below).

You can use special setup codes, perform selftest procedures

for LCD, keyboard, EEPROM, relays and LEDs, watchdog.

The operation of these functions is outlined in the setup sec-

tion. The selftest procedures are described in detail in the

following subsections.

DISPLAY SELFTEST

The display selftest procedure consists of lighting up all of the

display segments together. The Display test is announced by a

scrolling "Display test" message.

The segments are lit for a few seconds and

then switched off before exiting the selftest

procedure.

KEYBOARD SELFTEST

The keyboard selftest procedure begins with the message “But-

ton test, press LCD, CAL and SETUP together to escape”. The

LCD will then show only a colon.

As soon as one or more keys are pressed, the appropriate

segments out of 88:88 corresponding to the pressed keys,

will light up on the screen.

For example, if SETUP and  are pressed together the LCD will

look like this: