Fuji Electric NP1L-RS2 - Self-Diagnosis; Self-Diagnosis Mode 1

3-10
3-4-1 Self-diagnosis mode 1
Setting the mode selection switch of the module to “7” activates Self-diagnosis Mode “1.”
This mode is used to check the internal memory and the lighting condition of LEDs.
<Diagnosis flow>
Start Set the mode selection switch to “7.”
Check the internal
memory of general
purpose communication
module.
Normal?
Check the lighting
of LEDs.
TS1 blinks (0.25s)
Repeat Self-diagnosis
Mode operations when
there is no change in the
status of the mode
selection switch.
No
Yes
Continue to blink if RAM error
is detected, and the check of
LED lighting condition will not
be executed.
1) Internal memory check
After the completion of LED lighting check, automatically returns to the diagnosis of the internal memory of general
purpose communication module.
If an internal memory error is detected, “TS1” blinks.
2) LED lighting check
Of the external LEDs of the module, the lighting condition of those operated by the general purpose communication
module are checked. When the mode selection switch is set to “7,” “TS1,” “TS2,” “RS-485 ALM” and “RS-232C ALM” LEDs
light up in this order.
<Normal lighting condition of LEDs>
RS485 ALM
RS232C ALM
TS1
TS2
1s
1s
1s
1s 10s
3-4 Self-diagnosis
Self-diagnosis