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GN-9212 User Manual
Page 46 of (54)
G-series GN-9212 DeviceNet Rev. 1.01.docx
returned no response (neither a normal response nor an exception response), since its last restart, clear
counters operation, or power–up.
Sub-
function
Data Field (Request)
Data
(Response
Field
)
Description
0x000F(15)
0x0000
Slave
Count
No Response
Sub-function 0x0064(100) Return Slave ModBus, Internal Status
The response data field returns the status of ModBus and Internal addressed to the remote device.
This status values are identical with status 1word of input process image.
Sub-
function
Data Field (Request)
Data
(Response)
Field
Description
0x0064(100)
0x0000
ModBus,
Status
Internal Same
1word
as
status
6.2.2. 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
Code
Name
Description
01
Illegal Function
The function code received in the query is not an allowable
action for the server (or slave).
02
Illegal Data
Address
The data address received in the query is not an allowable
address for the server (or slave).
03
Illegal Data
Value
A value contained in the query data field is not an allowable
value for server (or slave).
04
Slave Device
Failure
An unrecoverable error occurred while the server (or slave)
was attempting to perform the requested action.
05
Acknowledge
The server (or slave) has accepted the request and is
processing it, but a long duration of time will be required to
do so.
06
Slave Device
Busy
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.
08
Memory Parity
Error
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.
0A
Gateway Path
Unavailable
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.