Endress+Hauser Liquiline CM44 series - Modbus Registers; Analyzer Manual Actions

SD01189C/07/EN/04.17
Endress+Hauser
32 © Copyright Dec. 2016
This procedure is also recommended on startup of a PLC program. To limit traffic on fieldbus, it is sufficient
to read or write the fieldbus every 15 seconds or even less frequently.
6.1.4 Modbus Registers
Important:
The register addresses in the tables start with 0 as transmitted over the wire. Depending on the system it
is necessary to add +1 to the register according the tables to access the parameters correctly.
6.1.4.1 Analyzer Manual Actions
The following parameters are available to switch into fieldbus mode, which enables the remote control
over Modbus function, and to start an action and read back its progress.
Register
block
Analyzer Manual Actions
Register
type
Holding
Function
code
3 (Read Holding Registers)
16 (Write Multiple Registers)
Register
Parameter
Bytes
Data Type
Access
Description
9400
MODE_CHANGE_REQUEST
1
Unsigned8
R/W
This parameter is used to control
the active operation mode and can
be written with the following
values:
0: None
1: Enter fieldbus mode.
The CA80xx changes from
automatic mode to fieldbus mode.
2: Continue automatic mode:
The CA80xx changes from fieldbus
mode to automatic mode
continuing with the time schedule
as it was calculated when entering
automatic mode the first time.
3: Restart automatic mode:
The system changes from fieldbus
mode to automatic mode and
restarts the time schedule with the
current time as starting point.
9401
ABORT_ACTION_REQUEST
1
Unsigned8
R/W
The parameter is used to abort the
current activity and can be written
with the following values:
0: None
1: Abort current action
9402
MANUAL_ACTION_REQUEST
1
Unsigned8
R/W
This parameter is used to start an
action and can be written with the
following values:
0: None
1: Start measurement