Reading Request; Functional Command Request (Tare, Zero; Error Frame; Address And Baud Rate - Scaime eNod4-F ETHERNET Software User Manual

•
byte : lsb first
•
multi-bytes data : MSB first

4.4.2 Reading request

•
request
Address
1 Hex byte
•
SCMBus response
Address
1 Hex byte 2 Hex bytes
If the 'decimal point position' and the 'unit' settings are assigned to a non-null value, the response frame when
transmitting measurement contains the decimal point character (2E
measurement value by a space ASCII character (20
•
Fast SCMBus response
STX
02 2 Hex bytes
H
Note: Because values are encoded in signed hexadecimal bytes format (2's complement) some data bytes can be
equal to STX (02 ) or ETX (03
H
eNod4 address is not transmitted in the frame.

4.4.3 Functional command request (tare, zero...)

•
request :
Address
1 Hex byte
•
response (SCMBus and fast SCMBus) :
Address
1 Hex byte
If the command execution is successful, eNod4 sends back the request frame that has been received as an
acknowledgement.

4.4.4 Error frame

In case of an error upon reception of a request, eNod4 sends back an error frame that contains an error code:
•
response (SCMBus and fast SCMBus) :
Address
1 Hex byte
•
The error codes are listed below:
Error code
FE unknown command
H
FF error during command execution
H

4.5 Address and Baud rate

Address and baud rate identical to Modbus RTU (See § Modbus RTU)

4.6 Product identification

Product identification identical to Modbus RTU (See § Modbus RTU)
Command
1 Hex byte (command)
Status
N ASCII Hex bytes
).
H
Status word
3 signed Hex bytes (2's
complement)
) or DLE (10 ) so before those specific bytes values a DLE (10
H H
Command
1 Hex byte (command)
Command
1 Hex byte (command)
Error code
1 Hex byte (command)
Meaning
User manual SCAIME:
NU-Soft-eNod4F-ETH-E-0716_235709-C.doc
CR
1 ASCII byte (0D )
H
Value
1 ASCII byte (0D
) and the unit that is separated from the
H
Value
Σ of previous bytes
and b7 bit set to 1
CR
1 ASCII byte (0D )
H
CR
1 ASCII byte (0D )
H
CR
1 ASCII byte (0D )
H
requested command is not supported by eNod4
ex. : tare when gross meas.<0
15/113
CRC
1 Hex byte
CR CRC
) 1 Hex byte
H
Cks ETX
03
H
) byte is inserted. The
H
CRC
1 Hex byte
CRC
1 Hex byte
CRC
1 Hex byte
Description