Mitsubishi Electric FR-A820-00046 Instruction Manual page 821

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Parameters
Error detection of message data
The following errors are detected in message data from the master. The inverter is not tripped even
if an error is detected.
Error item
Parity error
Framing error
Overrun error
Message frame error
CRC check error
Tab. 5-292: Error check items
NOTE
The LF signal can be assigned to an output terminal by setting Pr. 190 to Pr. 196 (output terminal
function selection). Changing the terminal assignment may affect other functions. Set parameters
after confirming the function of each terminal.
Modbus register
● System environmental variables
Register
40002
40003
40004
40006
40007
40009
40010
40014
40015
Tab. 5-293: System environment variable
Communication parameter settings are not cleared.
At a write, the data is set as the control input command.
At a read, the data is read as the inverter running status.
At a write, the data is set as the operation mode setting.
At a read, the data is read as the operation mode setting.
FR-A800
Error description
The data received by the inverter is different from
the specified parity (Pr. 334 setting).
The data received by the inverter is different from
the stop bit length (Pr. 334) setting.
The next data has been sent by the master before
the inverter completes receiving the preceding
data.
The data length of the message frame is checked,
and an error is generated if the received data
length is less than 4 bytes.
An error is generated if the data in the message
frame does not match the calculation result.
Definition
Inverter reset
Parameter clear
All parameter clear
Parameter clear
All parameter clear
Inverter status/control input command
Operation mode/inverter setting
Running frequency (RAM value)
Running frequency (EEPROM value)
(N) Operation via communication and its settings
Inverter operation
When this error occurs, Pr. 343 is
incremented by one.
When this error occurs, the LF signal is
output.
Read/Write
Remarks
Write
Any value can be written
Write
Set H965A for the write value.
Write
Set H99AA for the write value.
Write
Set H5A96 for the write value.
Write
Set HAA99 for the write value.
Read/Write
Refer to the following.
Read/Write
Refer to the following.
The display can be changed to the rotations
Read/Write
per minute using Pr. 37, Pr. 144 and Pr. 811.
Write
(Refer to page 5-324.)
5 - 641

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