Delta AS Series Operation Manual page 591

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12.3.3.2 ERROR LED Indicators Blinking Every 0.5 Seconds
The following errors are specified as warnings to ensure that the CPU module can still run even when the warnings are
triggered by its AIO modules.
Error
Code
16#1800
16#1801
16#1802
16#1803
16#1804
16#1805
16#1806
16#1807
16#1808
16#1809
12.3.4 Troubleshooting for the Load Cell Module AS02LC
12.3.4.1 ERROR LED Indicators Are ON
You can set up HWCONFIG to have the following errors appear as warnings when they occur. Otherwise, when an error
occurs, only an error message appears.
Error
Code
16#1605
16#1607
Description
Counter overflow / underflow on CH1
Counter overflow / underflow on CH2
Linear count exceeding the set
upper/lower limit on CH1
Linear count exceeding the set
upper/lower limit on CH2
The variation in relation to a SSI encoder
position exceeding the limit on CH1
The variation in relation to a SSI encoder
position exceeding the limit on CH2
Abnormal SSI communication on CH1
Abnormal SSI communication on CH2
SSI absolute position cross zero point on
CH1
SSI absolute position cross zero point on
CH2
Description
Hardware failure (that is, the driver board)
The external voltage is abnormal.
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Solution
Check the counter result. If the alarm is not required,
disable the alarm output function in HWCONFIG. Use
any of the followings to clear the error code: clear,
reset, preset the counter, restart the module, or
execute DHCCNT instruction again.
Check the signal received by channel 1 and 2.
Hardware counter is still counting; when the number is
accumulated to the maximum and go back to the
minimum, the error code will be cleared.
Check if there is any interruption and check the device
specification to see if the offset setting is matching with
the actual placement. When the next reading is normal,
the error code will be cleared.
Check the execution of DHCCNT instruction. If it is
parity check, check is there is any interruption and
check if the data format is correct. Check if the device
wiring is secure, and if the encoder power supply is
normal.
Check the SSI absolute encoder specification and
modify the setting accordingly. If the alarm is not
required, disable the alarm output function in
HWCONFIG. Use any of the followings to clear the
error code: clear, reset, preset the counter, restart the
module, or execute DHCCNT instruction again.
Solution
If the problem persists, contact the local authorized
distributors.
Check the power supply.