KROHNE UFC 400 Modbus EN - Manual (Page 19)

MODBUS PROTOCOL
5
19
UFC 400
www.krohne.com 05/2013 - 4002744801 - AD Modbus UFC 400 R01 en
5.8.7 Zero Calibration
A zero calibration is not necessary for normal operation. It's recommended that only trained
service engineers should perform a zero calibration.
The Coils and Registers below are required to perform a zero calibration. For further
information refer to
Zero Calibration on page 24.
Modbus Function Codes "Read Coils" (0x01) and "Write Single Coil" (0x05)
Coil
Address Name Function Action Values Display
Fct. No.
2000 2000 2000 2000
(0x07D0)
Zero Calibration
Control
Start Write 1 = start zero calibration C1.2.1
Status Read 0 = zero calibration not running /
complete
1 = zero calibration in progress
-
Modbus Function Code "Read Input Registers" (0x04)
Input
Register Name Type No. of
registers Values
20000 20000 20000 20000
(0x4E20)
Zero Calibration Result Byte 1 1 = OK
0 = NOK