KROHNE MFC 300 Modbus - Manual (Page 13)

MODBUS PROTOCOL
6
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MFC 300
www.krohne.com 11/2009 - 4000744801 - AD Modbus MFC 300 R01 en
6.8 Holding registers
Some parameters of the device can be accessed as Modbus holding registers.
Function code 03 (0x03) for "Read" operations and function code 16 (0x10) for "Write" operations.
The holding registers are grouped into the following different sections.
6.8.1 Counter parameters
INFORMATION!
Counter 3 parameters are only available for converter with IO2.
Modbus protocol
address Description and settings Converter
Fct. No. Type Number of
registers
40000 Counter 1 Function Counter 1 Function Counter 1 Function Counter 1 Function
1 = Sum Counter
2 = + Counter
3 = - Counter
0 = Off
C4.1.1 byte 1
40001 Measurement Counter 1 Measurement Counter 1 Measurement Counter 1 Measurement Counter 1
21 = Volume Flow
22 = Mass Flow
27 = Concentration Flow 1
28 = Concentration Flow 2
C4.1.2 word 1
40002 Counter 2 Function Counter 2 Function Counter 2 Function Counter 2 Function
1 = Sum Counter
2 = + Counter
3 = - Counter
0 = Off
C4.2.1 byte 1
40003 Measurement Counter 2 Measurement Counter 2 Measurement Counter 2 Measurement Counter 2
21 = Volume Flow
22 = Mass Flow
27 = Concentration Flow 1
28 = Concentration Flow 2
C4.2.2 word 1
40004 Counter 3 Function Counter 3 Function Counter 3 Function Counter 3 Function
1 = Sum Counter
2 = + Counter
3 = - Counter
0 = Off
C4.3.1 byte 1
40005 Measurement Counter 3 Measurement Counter 3 Measurement Counter 3 Measurement Counter 3
21 = Volume Flow
22 = Mass Flow
27 = Concentration Flow 1
28 = Concentration Flow 2
C4.3.2 word 1
41000 Low Flow Cutoff Value Counter 1 Low Flow Cutoff Value Counter 1 Low Flow Cutoff Value Counter 1 Low Flow Cutoff Value Counter 1 [m 3 /s]
or [kg/s]
C4.1.3 float 2
41002 Time Constant Counter 1 Time Constant Counter 1 Time Constant Counter 1 Time Constant Counter 1 [s] C4.1.4 float 2
41004 Set Counter 1 or Read Counter 1 Set Counter 1 or Read Counter 1 Set Counter 1 or Read Counter 1 Set Counter 1 or Read Counter 1 [m 3 ] or [kg] C4.1.7 float 2
41006 Low Flow Cutoff Value Counter 2 Low Flow Cutoff Value Counter 2 Low Flow Cutoff Value Counter 2 Low Flow Cutoff Value Counter 2 [m 3 /s]
or [kg/s]
C4.2.3 float 2
41008 Time Constant Counter 2 Time Constant Counter 2 Time Constant Counter 2 Time Constant Counter 2 [s] C4.2.4 float 2
41010 Set Counter 2 or Read Counter 2 Set Counter 2 or Read Counter 2 Set Counter 2 or Read Counter 2 Set Counter 2 or Read Counter 2 [m 3 ] or [kg] C4.2.7 float 2
.book Page 13 Tuesday, November 24, 2009 1:48 PM