KROHNE GFC 300 Modbus - Manual (Page 17)

MODBUS PROTOCOL
6
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GFC 300
www.krohne.com 03/2012 - 7312402100 - AD Modbus GFC 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
C5.8.2 ulong 2
50002 Slave address Slave address Slave address Slave address
1 = default
range = 1...247
C5.8.1 byte 1
50003 Parity Parity Parity Parity
0 = even parity (default)
1 = odd parity
3 = no parity
C5.8.3 byte 1
50004 Data format Data format Data format Data format
0 = Little Endian
1 = Big Endian (default)
C5.8.4 byte 1
50005 Transmission delay Transmission delay Transmission delay Transmission delay
0 ms (default)
range = 0...40 ms
C5.8.5 float 2
50007 Stop bits Stop bits Stop bits Stop bits
1 = 1 stop bit (default)
2 = 2 stop bits
C5.8.6 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