Hitachi H Series, Instruction Manual

Page: 135 / 143

16
2.2 Description of error indication
See the application manual (separate account) for the CPU module special
internal output (R7DE, WRF007, WRF0E0 – WRF19F) related to CPU link
module.
As for the content of R7DE (CPU link module error), “1” is set when ERR LED
on the CPU link module is lit. Further, the slot number of the CPU link
module, in which an error occurred, is set in WRF007.
However, when errors occur with multiple modules, the smaller slot number is
reflected. Care should be exercised in that these contents, when set once, are
held as they are until they are cleared from a programming device using
forced set / reset function. Furthermore, these error data are entirely cleared
when special internal output R7EC is set.
The contents in detail of errors WRF0E0 - WRF19F are managed by the
system, and they are not held.
No. Contents STATE display
Error
LED
*2
Timing of ON
Timing of
OFF
Remarks
1 WD error ON On occurrence
of an error to the
microcomputer
Reset *1
2 ROM/RAM
error
ON At the time of
power ON.
On occurrence
of an ROM /
RAM error. Reset *1 Occurrence of
ROM / RAM
error
↓
WD error.
3 Transfer error OFF On occurrence
of transfer frame
error.
･
Reset *1
･
Error clear
switch
Long transfer
statement
error, CRC
error
repre-
sents station
No.00 - 63
4 Transfer time
over
OFF On occurrence
of transfer time-
out during
transmission of
peripheral data.
･
Reset *1
･
Error clear
switch
repre-
sents station
No.00 - 63
5 Channel open
circuit
ON
On occurrence
of channel open
circuit.
･
Reset *1
･
On
recovery of
channel
repre-
sents station
No.00 - 63
: Lit
: OFF
: Lit or OFF