ECKELMANN Case Controller UA 4 E Series - Master-Slave Mode for the Synchronisation of Several Controllers

Firmware V3.13
21.04.2021
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5.8.5.2 Master-slave mode for the synchronisation of several controllers
Function description
Master configuration: The internal defrost timer must be active on one of the participating case
controllers(menu3-2,parameterDefrostTimer=INT).Thiscontrolleristhenthemaster.
Slave configuration: The other case controllers must be configured for external defrost start (menu 3-2,
parameterDefrostTimer=EXT).Thesearethenautomaticallyslavecasecontrollers.
On reaching the defrost end temperature for the respective zone the defrost relay is switched off. Cooling is
onlyresumedwhenallthecontrolzonesofalltheparticipatingcasecontrollershavecompletedthedefrostor
thesafedefrosttimehaselapsed.
Defrosting example
Case controller UA M configured as master. Case controller UA S configured as slave. The start of the
synchronisedmaster/slavedefrostisinitiatedviatheinternaltimer.
Note the following for this example:
The internal defrost signal is applied for the entire safe defrost time. Termination of defrosting is generally
governed however by de-energizing of the last defrost relay.
FurtherdetailsofspecialfeaturesandrestrictionsareprovidedinchapterMaster-slave mode for the
synchronisation of the zones of a single contr..
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