KROHNE MFC 300 Modbus - Manual (Page 16)

6
MODBUS PROTOCOL
16
MFC 300
www.krohne.com 11/2009 - 4000744801 - AD Modbus MFC 300 R01 en
6.8.3 Modbus parameters
6.9 Diagnostics
The Modbus interface supports the diagnostic function defined by the "Modbus Application
Protocol Specification".
Function code is 08 (0x08).
Modbus protocol
address Description and settings Converter Fct.
No. Type Number of
registers
50000 Baud Rate Baud Rate Baud Rate Baud Rate
1200 / 2400 / 3600 / 4800 / 9600 / 19200
(default) / 38400 / 57600 / 115200
C6.8.2 ulong 2
50002 Slave Address Slave Address Slave Address Slave Address C6.8.1 byte 1
50003 Parity Parity Parity Parity
0 = Even Parity (default)
1 = Odd Parity
3 = No Parity
C6.8.3 byte 1
50004 Data Format Data Format Data Format Data Format
0 = Little Endian (MSB first)
1 = Big Endian (LSB first)
C6.8.4 byte 1
Sub function code Name
hex dec
00 00 Return Query Data
01 01 Restart Communication Option
04 04 Force Listen Only Mode
0A 10 Clear Counters
0B 11 Return Bus Message Count
0C 12 Return Bus Communication Error Count
0D 13 Return Bus Exception Count
0E 14 Return Slave Message Count
0F 15 Return Slave No Response Count
10 16 Return Slave NAK Count (counter not used)
11 17 Return Slave Busy Count (counter not used)
12 18 Return Bus Character Overrun Count
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