KROHNE MFC 400 Modbus - Manual (Page 14)

5
MODBUS PROTOCOL
14
MFC 400
www.krohne.com 05/2013 - 4002525102 - AD Modbus MFC 400 R02 en
5.8.1 Device Control
The "Device Control" offers some basic functionality to operate with the signal converter.
Therefore, the Modbus interface provides five coils that can be accessed via Modbus Function
Code "Write Single Coil" (0x05).
Write a coil to value 1 value 1 value 1 value 1 (ON) to initiate the action.
The flow sensor can be switched between three modes. Use the following Modbus register to
request a change of the operation mode. The actual operation mode can be read via Modbus
register 39000 (details on page 15).
Modbus Function Code "Write Single Coil" (0x05)
Coil
Address Name Description Display
Fct. No.
1000 1000 1000 1000
(0x03E8)
Restart Device Restart entire signal converter D2.2.1
1001 1001 1001 1001
(0x03E9)
Reset Errors Clears the system error flags A3.1
1002 1002 1002 1002
(0x03EA)
Apply Changes Apply latest changes of configuration -
1003 1003 1003 1003
(0x03EB)
Discard Changes Discard all of the configuration changes made since the last "Apply
Changes"
-
1004 1004 1004 1004
(0x03EC)
Reset to Factory
Data
Resets the signal converter to factory configuration C6.6.3
Modbus Function Codes "Read Holding Registers" (0x03) and "Write Multiple Registers" (0x10)
Holding
Register Name Description Type No. of
registers Values Display
Fct. No.
51000 51000 51000 51000
(0XC738)
Operation
Mode
Set the actual operation mode
of the flow sensor
Byte 1 1 = Stop Mode
3 = Measure Mode
5 = Standby Mode
A.9