Sigmadue - microPAC MP-01 - User manual
4
1-1-3 Diagnostic LEDs
Referring to “
Figure 1.2 - Control Unit I/O and Communication Ports
” a description
of the LEDs functions is given in the table below.
Table 1.1 - Diagnostics LEDs description
Note: As the ON/OFF sequence of the LEDs has a specific meaning, it is important that
the user recognizes each LED status:
- OFF: the LED is not lit;
- Steady ON: the LED is lit in a stable way;
- Blinking:
the LED blinks at a frequence of 2.5 Hz (slow);
-
Flickering
: the LED
blinks
at a frequence of 10 Hz (fast);
-
Single flash
: the LED lits once for at least 200 ms;
-
Double flash
: the LED lits twice with pulses of 200 ms each;
-
Triple
flash: the LED lits three
with pulses of 200 ms each
.
LED Colour Action (note) Description
RS Yellow ON RS input active (RUN program)
ERR Red
Flickering (10Hz) Checksum error in RETAIN data
Single flash
CRC error in the configuration file, reset to default
Double flash Problem during file system mount
Triple flash Checksum VAR % RETAIN error
RUN Green
ON 1131 program running
OFF 1131 program stopped or not present
PWR Green ON Power Supply present
BAT Yellow ON Backup battery low
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