Menu Network
39
Input variable
A total of 16 digital and 16 analogue network inputs can be programmed. They are indicated by the
transmission
node number and the number of the network output variable of the
transmission
node.
INPUT 1:
NW Node:
2
analg.NW.outp.: 1
Source:
CAN
Value: 234
Assumption
: The analogue network output 1 on CAN node 2 is assigned to outdoor temperature.
Transmission thus does not include the unit or a label. Therefore, the reception node only receives
the number 234. Only when linked with a function, such as input variable outdoor temperature in the
function module HEATING CIRCUIT is the correct value displayed: 23.4°C.
When the controller is started, the entire analogue network input variables are set to 0 and all of the
digital ones to OFF.
Another
example
: input of the volume flow from the electronic volume flow encoder FTS4-50DL via
the
data link (DL-Bus)
. Sensor address = 1.
INPUT 2:
NW Node: 1
sensor address
analg.NW.outp.: 1
index of the volume flow (see data sheet of respective sensor)
Source: DL
Value: 357
Parameterizing of the digital input variables takes place in the same way.
Timeouts
Timeouts are monitoring functions that can cause reactions in the control strategy, if bus messages
are missing (such as a result of a device failure). The timeouts are divided into 8 groups of network
inputs:
Digital network inputs 1-4, 5-8, 9-12 and 13-16
Analogue network outputs 1-4, 5-8, 9-12, and 13-16
DIGITAL INP.: 1...4
Timeout: 60 Min
As long as the information is being read from the CAN bus, the
network status
is OFF. If the value
has not been updated since the set timeout, the network status changes from
OFF
to
ON
. You can
then program the system to react to the failure of a network node or a lack of information.
The net-
work status can optionally be selected for individual inputs or for all network inputs together ("network
status 33").
Network and network status are also available as sources for input variables in all function modules
and messages.
