No. Field name Example (hex) Remarks
9 CRC-16 (LSB) 71
*1. Broadcasting cannot be performed.
If the Read/Write from/to Multiple Holding Registers function is not executed normally, refer to
8-5-9 Exception Response on page 8-20.
8-5-9
Exception Response
In a query, the master requests a response, except for broadcast or simultaneous broadcast by group.
Although the inverter normally returns a response to the query, it returns an exception response if the
query has an error.
An exception response has the field configuration shown in the table below
.
Field configuration
Slave address
Function code
Exception code
Error check
The details of the field configuration are as shown below. An exception response has a function code,
which is the sum of the function code value of the query and 80 hex. An exception code shows the
cause of the exception response.
Function code
Query Exception response
01 hex 81 hex
03 hex 83 hex
05 hex 85 hex
06 hex 86 hex
0F hex 8F hex
10 hex 90 hex
17 hex 97 hex
The MSB is 1.
Exception code Description
01 hex An unsupported function is specified.
02 hex The specified address does not exist.
03 hex Data to write is out of the allowable range for writing.
07 hex
• The inverter does not allow this function.
• During operation, function attempts to write while write disallowed or a parameter that
cannot be written during operation.
• Function attempts to write to a write prohibited parameter during undervoltage. (Other
than all S group parameters, E52, H99, H198, H199)
8 Communications Functions
8-20
M1 Series Standard Type User's Manual (I669)
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