Hitachi EH-D6EAN - Page 150

Chapter 3 Programming
3 – 90
Err.
code
Error name
[Detected when]
Description
PLC
system
Applica-
tion
OK
LED
20
Misalignment /
Illegal instruction /
Privileged instruction
[Always]
Microprocessor has detected an exception
processing in application.
Run
Stop
21
Retain identity
mismatch
[Power on]
Retain data memory is undefined status due
to battery empty.
(*2)
Run
Stop
23
Unresolved external
references
[Always]
Unresolved external references are
detected.
Run
Stop
24
Software watchdog
of IEC task expired
[Always]
Actual cycle time has exceeded watchdog
time.
Set longer watchdog time.
Run
Stop
25
Processor load
watchdog
[Always]
Microprocessor load watchdog of all IEC
task has been exceeded.
Set longer interval time of task.
Run
Stop
26
IEC task
configuration failed
[Always]
IEC task configuration has failed.
Run
Stop
27
Division by zero
[DIV executed]
The divisor of division command is 0 in
IEC program.
Run
Stop
31
Load boot project
failed
[Power on]
Checksum value of application (user
program) in FLASH does not match the
checksum calculated.
Run
Stop
70
I/O configuration
error
[Always]
I/O configuration does not match with
actual I/O modules.
Run
Run
71
Battery error
[Always]
Battery voltage is low or battery is
disconnected.
Run
Run
75
Option board invalid
ID
[Power on]
Hardware error is detected in option board.
Or MICRO-EHV+ does not support the
target option board.
Run
Run
77
FLASH writing
failure
[FLASH writing]
Failure has been detected in writing
FLASH memory or the number of writing
times has been exceeded.
Run
Run
78
Parameters in
FLASH check sum
error
[Power on]
Checksum value of parameters in FLASH
(IP address, etc.) does not match the
checksum calculated.
Run
Run
CAUTION
If error cause is removed, error code remains except for error code 71 (battery error).
71 Error and OK LED blinking automatically disappear if battery is replaced to new one.
：ON
：250ms ON / 250ms OFF
：500ms ON / 500ms OFF
：1s ON / 1s OFF
：2s ON / 2s OFF
：OFF