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User Documentation
8. Outdated software versions and their peculiari-
ties
The control unit will be developed further successively. Functions are added or
changed in order to provide more safety, comfort and extended possibilities in future
versions. Therefore, it is always recommended to update your controller to the latest
available version (see chapter "Checking the current controller firmware").
If, however, an older software version is available on your controller, you will find in-
formation in the following chapters about the special features to be observed.
8.1 Control of the controller via Modbus TCP/IP up to and in-
cluding version 1.2.7.X
Please use the following control of the controller up to software version "1.2.7.X".
Register
Address
type
Holding Re-
0
gister
Holding Re-
1
gister
Holding Re-
35
gister
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EN_User_documentation_Instructions_for_controlling_the_Logamatic_5000_controller_series_via_Modbus_TCP_I
P_20210203.docx | 10.02.2021
Data point
Data
Name
Type
Heart Beat (in)
int
Heart Beat (out)
int
Operating mode
int
Value Range
0 to 65535
If the Modbus connection is
to be monitored for connec-
tion interruptions or
timeouts (Modbus commu-
nication with Heart Beat),
the counter must be written
to this register, which is not
equal to the old value that
can be read via the Heart
Beat (out) register.
0 to 65535
If this register is read, the
current counter value of the
heartbeat (in) can be re-
trieved (for verification of
the transmitted counter
value on the BMS side).
0 = Off,
Operating mode for boiler
1 = Keep Warm
request.
2 = operation
0 = Off = Boiler is off, con-
sumers are still controlled.
1 = Keep warm = Keep
warm function for industrial
cascade applications with
separate keep warm pump
(currently not relevant for
Logamatic 5000).
2 = Operation = normal op-
eration via heat request of
the boiler.
30|33
Meaning
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