KROHNE IFC 100 Converter Modbus EN - Manual (Page 13)

MODBUS PROTOCOL
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IFC 100
www.krohne.com 08/2014 - 4001410101 - AD Modbus IFC 100 R01 en
Also the result of a calibration procedure is accessed by an input register at Modbus Protocol
Address 20000 or 9000. The type are one or more float values. This is depending on the used
function (refer to "Calibration procedures").
6.8 Holding registers
All holding registers in the Modbus protocol address range from 40000 to 49998 are mapped into
the range 0 to 9998. This is done to give systems with restriction on the address range access to
the device.
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
Modbus protocol
address Description and settings Type Number of registers
1st 2nd
20000 9000 Result of a calibration function one or more float
values
2 times number of
values
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
21 = volume flow
22 = mass 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
21 = volume flow
22 = mass flow
C3.2.2 word 1
40004 4 no function byte 1
40005 5 no function 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
41004 1004 set counter Cnt1 or read Cnt1 set counter Cnt1 or read Cnt1 set counter Cnt1 or read Cnt1 set counter Cnt1 or read Cnt1 [m 3 ] or [kg] C3.1.7 float 2
41006 1006 low flow cutoff value Cnt2 low flow cutoff value Cnt2 low flow cutoff value Cnt2 low flow cutoff value Cnt2 [m 3 /s] or [kg/s] C3.2.3 float 2
41008 1008 time constant Cnt2 time constant Cnt2 time constant Cnt2 time constant Cnt2 [s] C3.2.4 float 2
.book Page 13 Monday, July 28, 2014 11:32 AM