HD52.3D
- 35 -
V1.11
Reply
Value
Length
Description
Function
:
2Bh
1 byte
Command of information reading
Data
: 0Eh
1
byte
Fixed value
(MEI - Modbus Encapsulated Interface type)
01h 1
byte Fixed value (Type of identification - basic)
01h 1
byte Fixed value (Conformity level – basic – fields
not individually accessible)
00h 1
byte Fixed value (No other fields are available)
00h 1
byte Fixed value (ID next object)
03h 1
byte Fixed value (Number of fields)
00h 1
byte Fixed value (ID first field)
Length1
1 byte
First field length
Value 1
(Length1) byte
First field value (Manufacturer)
01h 1
byte Fixed value (ID second field)
Length 2
1 byte
Second field length
Value 2
(Length2) byte
second field value (Model)
02h 1
byte Fixed value (ID third field)
Length 3
1 byte
Third field length
Value 3
(Length3) byte
Third field value (Firmware version)
ERROR REPLIES
Correctly addressed commands, that got also through CRC control, can nevertheless generate
error conditions, for example if one tries to read an inexistent parameter or if the instrument is
asked to perform a function which is not compatible with its model.
A reply containing an error code is generated in all cases in which the instrument cannot fulfill,
for whatever reason, the requested operation. The value entered in the field
Function
corre-
sponds to the received function code, but with the most significant bit (MSB) set to 1, so as to
signal to the “Master” unit both the error condition and the function that caused the error.
Reply
Value
Length
Description
Function
:
Requested function code
with MSB=1
1 byte
Error in performing the requested
function
Data
:
from 01h to 02h
1 byte
Error code
The table below shows the error codes:
TAB. 10.C - Error codes
Error
code
Error
From FW
version
Note
0001 Invalid
function.
The instrument doesn’t manage the requested function.
1.00
0002 Invalid
address.
At least one of the registers specified in the command is
inexistent.
1.00
For additional information regarding the protocol, visit the site "www.modbus.org".
Summary of Contents for HD52.3D... series
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