Mitsubishi Electric 800 Series Instruction Manual page 77

• Error code list
Code Error Item
01 ILLEGAL FUNCTION
02 IILLEGAL DATA ADDRESS
03 ILLEGAL DATA VALUE

An error does not occur in the following cases:
• Function code H03 (read data of holding register)
When there are 1 or more number of reads (No. of Points) and there is 1 or more holding register from where data can be read
• Function code H10 (write data to multiple holding registers)
When there are 1 or more number of writes (No. of Points) and there is 1 or more holding registers to which data can be written
In other words, when function code H03 or H10 is used and multiple holding registers are accessed, an error will not occur even if a non-
existent holding register or holding register that cannot be read or written is accessed.
NOTE
• An error will occur if all accesses holding registers do not exist. The data read value of non-existent holding registers
is 0, and data is invalid when written to non-existent holding registers.
• 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.
76
PARAMETER
The query message from the master is set with a function code that cannot be handled
by the slave.
The query message from the master is set with a register address that cannot be
handled by the inverter.

(No parameter, parameter cannot be read, parameter cannot be written)
The query message from the master is set with data that cannot be handled by the
inverter.
(Out of parameter write range, a mode is specified, other error)
Error description