KROHNE MFC 400 Modbus - Manual (Page 12)

5
MODBUS PROTOCOL
12
MFC 400
www.krohne.com 05/2013 - 4002525102 - AD Modbus MFC 400 R02 en
The single data character in the response telegram will indicate the type of error detected.
These are as follows:
Errors due to communications faults (CRC errors, Parity errors etc.) are logged but no response
is returned because the data in the received telegram is deemed unreliable. The master system
can read the error logs by using the diagnostics command (for details on Function Code 0x08
refer to
Diagnostics on page 13).
5.6 Device identification
Retrieve all of the identification information from the signal converter.
Modbus Function Code "Encapsulated Interface Transport" (0x2B).
Modbus Encapsulated Interface (MEI) type (0x0E).
Error
Code Name Meaning
01 ILLEGAL FUNCTION The requested function code is not supported or not valid due to the
current settings of the device.
02 ILLEGAL DATA
ADDRESS
The register requested is not valid or the quantity of requested
registers hits invalid registers.
03 ILLEGAL DATA VALUE The requested data is invalid for the register being written.
04 SLAVE DEVICE
FAILURE
An unrecoverable error occurred while the slave was attempting to
perform the requested action.
06 SLAVE DEVICE BUSY The slave is unable to process the requested command because a
long-duration command is in progress. The master should
retransmit the message later.
Category Object
Id
Object name Type Content
Basic 0x00 VendorName 16 byte ASCII String KROHNE
0x01 ProductCode 10 byte ASCII String CG number; order code for the
signal converter assembly
0x02 MajorMinorRevision 7 byte ASCII String Electronic Revision number
Regular 0x03 Vendor URL 32 byte ASCII String www.krohne.com
0x04 ProductName 16 byte ASCII String MFC400
0x05 ModelName 16 byte ASCII String Modbus
0x06 UserApplicationName 16 byte ASCII String User tag, displayed on the
header of the local screen