Fuji Electric NP1L-RS4 - Self-Diagnosis Mode 2; RS to CS Signal Check; ER to DR Signal Check; RS-232 C;RS-485 Data Check

3-11
3-4-2 Self-diagnosis mode 2
This mode is used to check the completeness of communications by looping back sent data and control signals via the
communication port.
(1) RS to CS signal check
In this check, the general purpose communication module turns RS signal ON to check whether CS signal is looped back
and turns ON, and then checks that this signal turns OFF.
When normal, “TS2” lights up; proceeds to step (2).
If abnormal, “TS2” blinks (at 0.5-second intervals) after 5 seconds; proceeds to step (2).
(2) ER to DR signal check
In this check, the general purpose communication module turns ER signal ON to check whether DR signal is looped back
and turns ON, and then checks that this signal turns OFF.
When normal, “TS1” lights up; proceeds to step (3).
If abnormal, “TS1” blinks (at 0.5-second intervals) after 5 seconds; proceeds to step (3).
(3) RS-232C/RS-485 data check
The general purpose communication modules sends 16 bytes of data once and checks the looped back data received.
If both ports are normal, “RS-232C ALM” and “RS-485 ALM” light up; proceeds to step (4).
If RS-485 is abnormal, “RS-232C ALM” lights up after 10 seconds and “RS-485 ALM” blinks (at 0.5-second intervals);
proceeds to step (4).
If RS-232C is abnormal, “RS-232C ALM” blinks (at 0.5-second intervals) after 10 seconds and “RS-485 ALM” lights up (at
0.5-second intervals); proceeds to step (4).
If both ports are abnormal, “RS-232C ALM” and “RS-485 ALM” blinks (at 0.5-second intervals); proceeds to step (4).
(4) Preservation of the result of the check
After 10 seconds of displaying the results from (3) above, the module returns to step (1). Here, if the setting of the mode
selection switch has been changed, Self-diagnosis Mode 2 is ended to enter the designated mode.
Note 1: When an RS-232C dedicated module (NP1L-RS2) is used, “RS-485 ALM” is kept turned off. When an RS-485
dedicated module (NP1L-RS4) is used, “RS-232C ALM,” “TS1” and “TS2” are kept turned off.
Note 2: When judged as “normal,” the next operation is started without any waiting time. Therefore, after all LEDs have
turned off at the start of diagnosis, the corresponding LED lights up instantaneously.
1)
2)
3)
4)
5)
6)
7)
8)
CD
RD
SD
ER
SG
CS
DR
RS
Pin No.
9)RI
<RS-232C loop-back connector>
1)
2)
3)
4)
5)
6)
7)
8)
SDB
SDA
(SDB)
(SDA)
SG
RDB
FG
Pin No.
9)
RDA
<RS-485 loop-back connector>
3-4 Self-diagnosis
Self-diagnosis