Technical data

Technical Manual Cold Storage Controllers TKP / TKC x130 - x140Page 22
Communication with compound controller VPR 19000
The TKP/TKC controller can be used as intelligent cold storage
controller in co-operation with our compound control system VPR
19000. In this case, the VPR central processing unit will control the
TKP/TKC.
When the TKP/TKC's are connected to the compound controller
each one needs an individual adress („ adress in netwk “, mode page)
For the TKP/TKC's there is a possibility of assigning each controller
to a certain compound (Refrigeration or Freezing, „ compound “,
mode page). This enables the VPR to transmit specific informations
to the cold storage controllers assigned to the compound within a
failure occurs.
More detailed informations you will find in the technical manual of the
VPR 19000 compound system.
Behavior in case of the VPR-function 'Low Power Optimization'
If this feature is used in the VPR-system, the VPR can disable the
refrigeration functions of the TKP/TKC for a certain time, even
though the refrigeration setpoint is increased. The fans and the
heating continues working, they will be disabled in case of
compound failure only .
Behavior in case of compound failure
If a TKP/TKC is assigned to a certain compound and a disturbance
occurs, the unit responds as follows:
- The solenoid valves will be closed
- The fan is switched off
- A defrost period will be terminated. A new defrost cycle is only
possible when the compound problem is solved.
To see if this function is released, look at „ solenoid valve “ (actual
values page).
Data transmission disturbances
If the controller gets no new informations from the VPR, it continues
working with the actual settings.
If there was an order from the VPR to close the solenoid valves and
a technical defect interupts the data transmission for more than 30
minutes, the TKP/TKC ignores this order and starts working normally.
When data transmission is restored, the TKP/TKC will work again
immediately according to the commands of the VPR.
E-LINK
This controllers can be networked together with other ELREHA-
control devices. For this duty
ELREHA has developed E-LINK, a
transmission protocol, which will be transmitted on a two-wire bus-
system based on the RS-485-Standard. With E-LINK, up to 78
controllers can be assembled.
Each controller in a network has its individual adress („ adress in
netwk “, mode page). This adress is necessary for selecting the right
controller while a data package is transmitted on the network bus.
If the controllers are used outside a network, the adress and the
parameter „ compound “ are of no importance.
N PE
44
Attention !
Note polarity while
connectin
g
cables !
PE
N PE
DO NDO
N PE
DO NDO44 44
shieldin
g
N PE
DO NDO44
Connections
as short as
possible !!
5 cm max.
(2.0 inch)
DO NDO
Remote control with SMZ
The TKP/ TKC controller series can be operated via interface when
they are connected to a communication module SMZ 3130. The
SMZ will display exactly the same as at the TKP/TKC; the keys of the
SMZ work as if they where the keys of the TKP/TKC. So you can get
alarm messages from your equipment and you can control the
device remotely .
Configuration / Service via PC
The controllers can be linked via RS 232 or RS 485 interface to a PC
where the ELREHA-software „Coolvision“ works. From there you
can change parameters, save them on the hard disk (download) and
send it to other controllers (upload).
Wiring of data lines
The scheme beside shows briefly,
how dataline wiring of several
controllers must be made. The
shield has to be grounded at each
controller to the PE-contact and to
the GND contact of the RS485!
This will assure good interference
suppression, even for long datalines
between the controllers.
GND-terminals
TKP 31x0 ..... term. 44
TKC 51x0 ..... term. 40
TKC 191x0 ... term.d32, analog PCB
Networking of controllers via E-LINK