KROHNE IFC 300 Converter Modbus EN - Manual (Page 20)

6
MODBUS PROTOCOL
20
IFC 300
www.krohne.com 07/2010 - 4000410703 - AD Modbus IFC 300 R03 en
6.10.3 Conductivity Calibration
1 User enters the actual conductivity in S/m User enters the actual conductivity in S/m User enters the actual conductivity in S/m User enters the actual conductivity in S/m
This is the target for the calibration
2 Write actual conductivity Write actual conductivity Write actual conductivity Write actual conductivity
Write Holding Register 43034 type float
(Modbus Fct. 0x10)
3 Write actual conductivity Write actual conductivity Write actual conductivity Write actual conductivity
Write Holding Register 43036 type float
(Modbus Fct. 0x10)
3a The target value has to be written to both
registers!
4 Start conductivity calibration: Start conductivity calibration: Start conductivity calibration: Start conductivity calibration:
Set single coil 2002 to 1 (Modbus Fct. 0x05)
5 Check status of calibration: Check status of calibration: Check status of calibration: Check status of calibration:
Read single coil 2002 (Modbus Fct. 0x01)
5a [2002 == 1: calibration running]
5b [2002 == 0: calibration complete]
6 Read Calibration Value Read Calibration Value Read Calibration Value Read Calibration Value
Read Input Register 20000 type float
(Modbus Fct. 0x04)
7 Write the calibration value Write the calibration value Write the calibration value Write the calibration value
Write Holding Register 43032 type float
(Modbus Fct. 0x10)
8 Activate new values Activate new values Activate new values Activate new values
Set single coil 1001 to 1 (Modbus Fct. 0x05)
8a This results in a warm start of the device.
Will take maximum 5s.
.book Page 20 Friday, July 9, 2010 10:31 AM