Led Indications On Plc Main Unit And Troubleshooting - FATEK FBs Series User Manual

8.3 LED Indicators on PLC Main Unit and Troubleshooting
Receive Indicator "RX"
接收指示
"RX"
Transmit Indicator "TX"
傳送指示
" TX"
Power Indicator〝POW〞
After the PLC is power on, with correct power source and wiring, the〝POW〞LED indicator in the middle of the PLC
nameplate will turn on, indicating that power supply is normal. If the indicator is not on, please try to temporarily remove
the wiring of 24VDC output power for Sensor. If the LED is back to normal, it means that the load on the power for the
24VDC input circuit is too large so that PLC enters overload low voltage protection mode. (When PLC enters overload
low voltage protection mode, "POW" LED is off and there are slight and intermittent low frequency hissing sounds, from
which one can tell if the 24VDC power is overloaded or shorted.)
When the above method still cannot turn on the〝POW〞LED, if it is confirmed that correct power input exists between
PLC power input L/N terminals or +/- (DC power), please send the unit to your local distributor for repair.
Operation Indicator〝RUN〞
As long as the CPU is working properly, in the STOP state, this indicator will go on and off for 2 seconds, respectively.
When it's in the RUN state, the indicator will go on and off for 0.25 seconds, respectively. To make PLC enter into Run
state, or switch from RUN to STOP state, it has to be done through the programmer (FP-08 or WINPROLADDER).
Once PLC is set to RUN or STOP, it will keep that state even after power off. The only exception is, when using the
ROM PACK, no matter if it's running or stopped before power off, PLC will automatically enter RUN state (with correct
ROM PACK syntax check) when power is back. In normal operation of PLC upon errors (e.g., errors in WDT timer and
program), PLC will automatically switch to STOP state and light the〝ERR〞error indicator. If it is a minor error, the RUN
state can be resumed as long as the power is back after an outage. In case of serious errors, the PLC cannot be
operated again with the programmer until the problem is solved. If PLC cannot be resumed to RUN state after all,
please send it to your local distributor for repair.
Error Indicator〝ERR〞
In normal PLC operation, either in RUN or STOP state, this indicator will not show any signal (off). If it is on, it means
that the system has an error (e.g., WDT time-out, program error, communication error, etc.)
If it is constantly on, please reset the power. If the situation is still the same, it implies a hardware failure in CPU and has
to be sent to the distributor for repair.
When the ERR indicator flashes with a 0.5 sec interval, it means that some anomaly occurs to PLC. At the same time,
status indicators Y0~Y3 switch to serve as indications of 15 error codes (the corresponding outputs are disabled), which
24V OUT
X0 X2 X4 X6
max.
400mA S/S X1 X3 X5
0
4
8
I2
PROGRAMMABLE
CONTROLLER
TX RX
0
PORT0
4
8
IN AC100~240V
Y1 Y2 Y4 Y5
C0 Y0 C2 Y3 C4
X10 X12
X8
X7 X9 X11 X13
I 2 3
5 6 7
9 I0 I I
I3
IN X
( )
POW
RUN
ERR
OUT Y
( )
I 2 3
5 6 7
9
FBs-24MCR2-AC
Y6 Y8
C6 Y7 Y9
H 8 - 2
輸入狀態指示
"Xn"
Input Status Indicator "Xn"
電源指示
"POW"
Power Indicator "POW"
運轉指示
"RUN"
Operation Indicator "RUN"
Error Indicator "ERR"
錯誤指示
"ERR"
Output Status Indicator "Yn" or
輸出狀態指示
"Yn"
error Indicator (when "ERR"
或錯誤碼指示
occurs)
(當有 發生時)
"ERR"