Error Response - Hitachi HX-RIO3 Series User Manual

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Sub-function Data Field (Request)
0x000F(15) 0x0000
Sub-function 0x0064(100) Return Slave ModBus, Expansion Module Status
The response data field returns the status of ModBus and expansion module addressed to the remote device.
This status values are identical with status 1word of input process image. Refer to 2.4.2.
Sub-function Data Field (Request)
0x0064(100) 0x0000

9.2.2. Error Response

In an exception response, the server sets the MSB of the function code to 1. This makes the function code
value in an exception response exactly 80 hexadecimal higher than the value would be for a normal response.
• Exception Codes
Exception
Name
Code
01 Illegal Function
02 Illegal Data Address
03 Illegal Data Value
04 Slave Device Failure
05 Acknowledge
06 Slave Device Busy
08 Memory Parity Error
Gateway Path
0A
Unavailable
Data Field (Response)
Slave No Response Count
Data Field (Response)
ModBus, RBUS Status
Description
The function code received in the query is not an allowable action
for the server (or slave).
The data address received in the query is not an allowable address
for the server (or slave).
A value contained in the query data field is not an allowable value
for server (or slave).
An unrecoverable error occurred while the server (or slave) was
attempting to perform the requested action.
The server (or slave) has accepted the request and is processing it,
but a long duration of time will be required to do so.
Specialized use in conjunction with programming commands. The
server (or slave) is engaged in processing a long–duration program
command. The client (or master) should retransmit the message
later when the server (or slave) is free.
The server (or slave) attempted to read record file but detected a
parity error in the memory. The client (or master) can retry the
request, but service may be required on the server (or slave)
device.
Specialized use in conjunction with gateways, indicates that the
gateway was unable to allocate an internal communication path
from the input port to the output port for processing the request.
HX-RIO3 Series
Description
Description
Same as status 1 word