Troubleshooting; Error Indication; Error Code - Hitachi MICRO-EHV+ Applications Manual

3.26 Troubleshooting

3.26.1 Error indication

MICRO-EHV+ indicates the error by the lighting pattern (ON / blink / OFF) of OK LED. If two or more errors are
detected at the same time, smaller error code has higher priority to be displayed. If error is detected, read the
description following countermeasures depending on error level.

3.26.2 Error code

Error code Error level
88, 11 to 19 Serious error
20 to 31 Exception
70 to 78 Warning
Err. Error name
code [Detected when]
88 Microprocessor
failure
[Power on]
11 System program error
(FLASH)
[Power on]
12 System RAM failure
[Power on]
Misalignment /
13
Illegal instruction /
Privileged instruction
[Always]
16 System program error
(system RAM)
[Always]
18 MAC address error
[Power on]
19 Data memory failure
[Power on]
：ON ：250ms ON / 250ms OFF
Countermeasure
Cycle power. If it does not solve, contact your local supplier.
Exception status is cleared only by Reset operation.
Execute Reset cold/warm/origin by HX-CODESYS
User program execution does not stop by warning. If you need to activate alarm or
any action by warning, use CmpHitachi_MV library.
Description
Overflow of internal watchdog timer due to
system program error.
Checksum value of system program
(Runtime) in FLASH does not match the
checksum calculated.
Read/write check for system RAM has
failed.
Microprocessor has detected an exception
processing in system program. (*1)
Checksum value of system RAM does not
match the checksum calculated.
MAC address is missing or wrong value.
Read/write check for data memory (RAM)
has failed.
：500ms ON / 500ms OFF
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Chapter 3
PLC
system
Stop
Stop
Stop
Stop
Stop
Stop
Stop
：1s ON / 1s OFF ：2s ON / 2s OFF
Programming
Applica- OK
tion LED
Stop
Stop
Stop
Stop
Stop
Stop
Stop
：OFF