Hitachi EH-D6EAN - Error Code; Error Indication; Troubleshooting

Chapter 3 Programming
3 – 89
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
Countermeasure
88, 11 to 19
Serious error
Cycle power. If it does not solve, contact your local supplier.
20 to 31
Exception
Exception status is cleared only by Reset operation.
Execute Reset cold/warm/origin by HX-CODESYS
70 to 78
Warning
User program execution does not stop by warning. If you need to activate alarm or
any action by warning, use CmpHitachi_MV library.
Err.
code
Error name
[Detected when]
Description
PLC
system
Applica-
tion
OK
LED
88
Microprocessor
failure
[Power on]
Overflow of internal watchdog timer due to
system program error.
Stop
Stop
11
System program error
(FLASH)
[Power on]
Checksum value of system program
(Runtime) in FLASH does not match the
checksum calculated.
Stop
Stop
12
System RAM failure
[Power on]
Read/write check for system RAM has
failed.
Stop
Stop
13
Misalignment /
Illegal instruction /
Privileged instruction
[Always]
Microprocessor has detected an exception
processing in system program. (*1)
Stop
Stop
16
System program error
(system RAM)
[Always]
Checksum value of system RAM does not
match the checksum calculated.
Stop
Stop
18
MAC address error
[Power on]
MAC address is missing or wrong value.
Stop
Stop
19
Data memory failure
[Power on]
Read/write check for data memory (RAM)
has failed.
Stop
Stop
：ON
：250ms ON / 250ms OFF
：500ms ON / 500ms OFF
：1s ON / 1s OFF
：2s ON / 2s OFF
：OFF