![SMC Networks LECSB Series Operation Manual Download Page 232](http://html1.mh-extra.com/html/smc-networks/lecsb-series/lecsb-series_operation-manual_1299641232.webp)
9 - 4
9. TROUBLESHOOTING
Display
Name
Definition
Cause
Action
(Note 2)
Alarm details
AL.10
Undervoltage
Power supply
voltage dropped.
1. Power supply voltage is low.
<Checking method>
Check that the power supply voltage is
the following voltage or more.
LECSB2-
□
: 160VAC
LECSB1-
□
: 83VAC
Check the power supply.
2
2. Shortage of power supply capacity
caused the power supply voltage to
drop at start, etc.
<Checking method>
Check that the bus voltage is the
following voltage or more.
LECSB2-
□
: 200VDC
LECSB1-
□
: 158VDC
3. The bus voltage dropped to the
following value or less.
LECSB2-
□
: 200VDC
LECSB1-
□
: 158VDC
4. There was an instantaneous control
power failure of 60ms or longer.
1
5. Faulty parts in the driver.
<Checking method>
1. Alarm (AL.10) occurs if power is
switched on after disconnection of
all cables but the control circuit
power supply cables.
2. Check that the bus voltage is the
following voltage or more.
LECSB2-
□
: 200VDC
LECSB1-
□
: 158VDC
Change the driver.
6. Waveform of power supply voltage is
distorted.
When power supply impedance is
high, waveform of power voltage is
distorted, and it may recognized as
undervoltage.
Set the parameter No.PC27
to "0001".
AL.12
Memory error 1
(RAM)
RAM, memory fault Faulty parts in the driver
<Checking method>
Alarm (any of AL.12 and AL.13) occurs
if power is switched on after
disconnection of all cables but the
control circuit power supply cables.
Change the driver.
AL.13
Clock error
Printed board fault
Change the driver.
AL.15 Memory error 2
(EEP-ROM)
EEP-ROM fault
1. Faulty parts in the driver
<Checking method>
Alarm (AL.15) occurs if power is
switched on after disconnection of all
cables but the control circuit power
supply cables.
Change the driver.
2. The number of write times to EEP-
ROM exceeded 100,000.