KROHNE IFC 300 Converter Modbus EN - Manual (Page 14)

6
MODBUS PROTOCOL
14
IFC 300
www.krohne.com 07/2010 - 4000410703 - AD Modbus IFC 300 R03 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
1: not available for senor option PF (partly filled)
2: not available for senor option CAP (capacitive)
3: only available for senor option PF (partly filled)
INFORMATION!
Counter 3 parameters are only available for converter with IO 2.
Modbus protocol
address Description and settings Converter Fct.
No. Type Number of
registers
1st 2nd
40000 0 counter 1 function counter 1 function counter 1 function counter 1 function
1 = sum counter
2 = + counter
3 = - counter
0 = off
C3.1.1 byte 1
40001 1 measurement Cnt1 measurement Cnt1 measurement Cnt1 measurement Cnt1 (1)
21 = volume flow
22 = mass flow
C3.1.2 word 1
40001 1 measurement Cnt1 measurement Cnt1 measurement Cnt1 measurement Cnt1 (3)
27 = volume flow
C3.1.2 word 1
40002 2 counter 2 function counter 2 function counter 2 function counter 2 function
1 = sum counter
2 = + counter
3 = - counter
0 = off
C3.2.1 byte 1
40003 3 measurement Cnt2 measurement Cnt2 measurement Cnt2 measurement Cnt2 (1)
21 = volume flow
22 = mass flow
C3.2.2 word 1
40003 3 measurement Cnt2 measurement Cnt2 measurement Cnt2 measurement Cnt2 (3)
27 = volume flow
C3.2.2 word 1
40004 4 counter 3 function counter 3 function counter 3 function counter 3 function
1 = sum counter
2 = + counter
3 = - counter
0 = off
C3.3.1 byte 1
40005 5 measurement Cnt3 measurement Cnt3 measurement Cnt3 measurement Cnt3 (1)
21 = volume flow
22 = mass flow
C3.3.2 word 1
40005 5 measurement Cnt3 measurement Cnt3 measurement Cnt3 measurement Cnt3 (3)
27 = volume flow
C3.3.2 word 1
41000 1000 low flow cutoff value Cnt1 low flow cutoff value Cnt1 low flow cutoff value Cnt1 low flow cutoff value Cnt1 [m 3 /s] or [kg/s] C3.1.3 float 2
41002 1002 time constant Cnt1 time constant Cnt1 time constant Cnt1 time constant Cnt1 [s] C3.1.4 float 2
.book Page 14 Friday, July 9, 2010 10:31 AM