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Data communication
This page contains a description of a few of the possibilities you
will have with data communication.
Example
The controller has been
prepared for data commu-
nication.
The data communication
takes place via a two-core
twisted cable.
Up to 60 controllers may be
connected to one cable.
Example of menu display
• Measurements are shown at
one side and settings at the
other.
• You will also be able to see
the parameter names of the
functions on page 4-11.
18
This cable is also connected to
a gateway.
This gateway will now control
the communication to and
from the controllers.
It will collect temperature val-
ues and it will receive alarms.
When there is an alarm the
alarm relay will be activated for
two minutes.
• With a simple change-over
the values can also be
shown in a trend diagram.
• If you wish to check earlier
temperature measurements,
you can see them in the log
collection.
Manual RS8CK502 © Danfoss 05-2005
It is important that the installation of the data communication
cable is carried out correctly. Please refer to separate literature No.
RC.8A.C
The gateway can now be con-
nected to a modem.
When an alarm occurs from
one of the controllers, the
gateway will - via the modem
- make a phone call to the
service company.
Alarms
If the controller is extended
with data communication, it
will be possible to define the
importance of the transmitted
alarms.
The importance is defined with
the setting: 1, 2, 3 or 0. When
the alarm then arises at some
time, it will result in one of the
following activities:
1 = Alarm
The alarm message is sent off
with alarm status 1. This means
that the gateway with address
125 in the system will have its
alarm relay output activated
for two minutes. Later, when
the alarm ceases, the alarm
text will be retransmitted, but
now with status value 0.
At the service company a
modem, gateway and PC with
system software type AKM
have been installed.
All the controllers' functions
can now be operated from the
various menu displays.
The programme will for exam-
ple upload all the collected
temperature values once a day.
2 = Message
The alarm text is transmitted
with status value 2. Later, when
the "message" lapses, the alarm
text is retransmitted, but now
with status value 0.
3 = Alarm
As "1", but the master gateway's
relay output is not activated.
0 = Suppressed information
The alarm text is stopped at
the controller. It is transmitted
nowhere.
EKC 414A
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