Special I/O Errors - Omron CompoNet MX2 Series User Manual

6 Troubleshooting
6-5

Special I/O Errors

If a problem is found in the output data of Special I/O, the inverter returns an error code to the input data
without executing the request.
Determine whether or not an error occurred by the most significant bit (word address n, bit 7) of the
Function Code in the input data.
In case of an error, the Function Code in the input data has a value of the output data added with
80 hex.
The table below shows the error code and corrective action for each Special I/O error.
Error Code
01 hex Function Code
Error
02 hex Register No.
Error
04 hex Slave Device
Error
21 hex Data Setting Error
22 hex Write Mode Error
23 hex Register Size
Error
*1 UV: During undervoltage
6 - 12
Name Description
A code other than 03/10/43 or 50 hex
is set as Function Code.
Specified Register No. does not exist.
Option inverter communications error.
(Internal communications error
occurred between CompoNet Commu-
nications Unit and inverter)
Upper or lower limit of write data set-
ting range is exceeded.
Inverter mode is incorrect.
• Changing unchangeable register
during operation.
• ENTER command was issued dur-
ing operation (UV
• Writing to register in trip (UV
state.
• Writing to register in soft lock mode.
• Changing an unchangeable
input/output terminal.
• Changing contact type of terminal to
which RS (Reset) is allocated.
• Writing to a register when auto-tun-
ing is enabled.
• Writing to a lock-enabled register
during password setting.
Reading/Writing 2-byte data from/to a
4-byte register or 4-byte data from/to a
2-byte register.
Check and correct Function Code.
Check and correct Register No.
Check if CompoNet Communica-
tions Unit is mounted properly (if
connector is sufficiently inserted).
If problem persists, replace Compo-
Net Communications Unit.
Check and correct data size so data
is within data setting range.
• Write after stopping inverter oper-
ation.
• Write after clearing UV error.
• Write after releasing soft lock.
• Correct after checking if terminal
*1
).
is changeable.
*1
)
• Write after completing auto-tuning.
• Write after canceling password
setting.
Check and correct data size prop-
erly.
CompoNet Communications Unit User's Manual (I582-E1)
Corrective Action