ECKELMANN Case Controller UA 4 E Series, Инструкция по эксплуатации

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Firmware V3.13 21.04.2021 55/466
5.7.9 Sending and receiving the analogue values via CAN bus
It is possible to receive analogue values (t0, humidity, tc) from a remote case controller, and conversely to
send them to as many case controllers within the system as desired. This serves to reduce the number of
pressure transmitters installed in the system, thus leading to a reduction in costs.
The necessary parameterisation is carried out in menu 6-2-6.
Sending the analogue values
By setting the parameter AIN1/2 Send CAN the corresponding analogue value is made available within the
CAN bus and can be received by other case controllers.
Receiving the analogue values
Using the parameters AIN1/2 Rcv. CAN to „YES“ the analogue values can be received from a remote case
controller. The parameters AIN1/2 Rcv. CAN represent the CAN bus address of the case controller which sends
the analogue values.
Priority of the local pressure transmitter
The local pressure transmitter always has a higher priority than analogue values that are transmitted via
the CAN bus. If values from both sources are available then the controller will use the value from the local
pressure transmitter. This affects the data recording, visualisation, and with the corresponding
parameterisation, the control functions.
Example: Configuration of the analogue values for the sending and receiving of the analogue values for
Zone 1
Task
Four island freezers are to use the same pressure transmitter. In order to do this the pressure transmitter
is connected to a case controller and the pressure values recorded made available to the other three case
controllers.
The following parameters need to be set:
1. Configuration of the remote case controller – for example this has the CAN bus address 15
Menu 6-2-6:
Parameter AIN1 activ set to “Yes” (analogue input 1 is used)
Parameter Refrig.Z 1 (selection of the refrigerant)
Parameter LP Z1 min. (smallest pressure value for pressure monitoring at 4 mA)
Parameter LP Z1 max. (largest pressure value for pressure monitoring at 20 mA)
Parameter AIN1 Send CAN set to “Yes” (this is therefore the remote case controller)
Parameter AIN1 Rcv.CAN set to “–“
Parameter AIN1 Rcv. AIN1 set to “1”
A case controller where this parameter has been set to “YES” is termed a “Remote Case Controller”.
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ATTENTION
Beware of incorrect parameterisation! If the analogue value measured locally by the pressure
transmitter is not sent directly to the controller then the analogue value received via the CAN bus is
always used!
In the event of unsuitable parameterisation this can result in malfunctioning.
If the analogue value measured locally by the pressure transmitter is sent directly to the controller then
the analogue value received via the CAN bus is never used!
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