Mitsubishi Electric MELSEC iQ-R Series User Manual page 486

Error code Error
(hexadecima
l)
7F25H Data length error
7F26H Command error
7F30H System error
7F31H Simultaneous
transmission error
7F32H System error
7F40H Time-out error
7F41H Time-out error
7F42H Time-out error
7F50H to System error
7F54H
7F67H Overrun error
27 TROUBLESHOOTING
484
27.4 Error Code List
Description Signal
name
• The length of the received CHn
data exceeds the receive ERR.
area size.
• Another command was CHn
received before the unlock ERR.
processing when the
remote password is
registered.

• The operating system of
C24 detected some error.
• C24 and the target device 
started transmissions
simultaneously.

• The operating system of
C24 detected some error.
• No-reception monitoring PRO
time (timer 0) has timed
out.

• Response monitoring time
(timer 1) has timed out.
• Send monitoring time 
(timer 2) has timed out.

• The operating system of
C24 detected some error.
• C24 received the next SIO
data before it completed
receive processing of the
previous data.
Corrective action
• Correct the "data length" that
is transmitted from the target
device.
• Change the word/byte units
designation to 'byte units'.
• Increase the value for the
receive buffer memory length
designation.
• Perform data communications
after the unlock processing is
normally completed.
Page 490 Corrective actions
for system error
• Perform processing according
to the predefined arrangement
with the target device. If
necessary, change the
'simultaneous transmission
data valid/invalid designation'
(Un\G155/315) setting.
Page 490 Corrective actions
for system error
• Check if any data is missing
due to a data reception error.
• Check if the DTR control, etc.
interrupted data reception.
• Check the status of the target
device, and restart data
communications, as required.
• Check if the DTR control, etc.
interrupted data transmission.
Page 490 Corrective actions
for system error
• Decrease the transmission
speed and restart data
communications.
• Check whether momentary
power failure has occurred on
the station with C24. (can be
checked "AC DOWN counter"
of the special register.)
In case momentary power
failure has occurred, remove
the cause.
• Perform the registration, read,
and delete to/from the flash
ROM while the data
communication is not
performed.
Protocol
MC Nonpr Bidire Prede
ocedu ctiona fined
ral l



  
 
  
   