Error Codes - Omron E5AR-T User Manual

Section 7 Modbus Communications
● Error Codes
● No Response
7-6
End
Name
code
Function Received an unsupported function code.
H'01
code error
Variable The variable area number specified in the
H'02 address variable address is out of range.
error
The number of elements does not agree with
the number of data items.
Number of elements times 2 does not agree
with the byte count.
Variable
H'03 The response length exceeds the communi-
data error
cations buffer size.
The operation code or related information in
an operation command is not correct.
The written data exceeds the setting range.
The setting in the write data is not permitted
in the current operating mode.
• The communications writing function is
disabled
• Attempted to write to set values insetting
area 1 from setting area 0.
• Attempted to write to Protect Level set
Operation values from another level.
H'04
error • AT is being executed.
• The program number was changed during
programmed operation.
• User calibration is in progress.
• The operation command cannot be
processed.
• Unit error, unit change, display unit error, or
EEPROM error.
In the following cases, the received command is not processed and a
response is not returned. A timeout will occur at the host device.
• The slave address in the received command is different from the
communications unit number set in the E5AR-T/ER-T.
• A parity error, framing error, or overrun error occurred due to a
transfer error or other error.
• A CRC-16 code error occurred in the received command frame.
• A time interval greater that 3.5 characters occurred between data
while receiving a command frame.
Description
Error
detection
priority
1
2
3
4