HIMax Safety Manual - Tuv-fs.com

4 Processor Modules HIMaxNOTESystem malfunction possible!Only use the variants specified here!4.3 Availability of Processor ModulesOne to four redundant processor modules can be used on a system base plate. Even if onlyone processor modules is available, the system is still functional.If a new processor module is plugged in to replace one that has failed, it copies the userprogram from the still functioning processor module (self education) and initiates redundantoperation.The availability can be also increased during operation by adding additional processormodules – up to a total of four processor modules.In this scenario, the user program must be configured for redundant operation.4.4 Replacing Processor ModulesRedundant processor modules can be replaced during operation, provided that at least oneprocessor module is available that can maintain safety-related operation while the othermodule is being replaced.NOTICEDisruption of the safety-related operation possible!The operation of the controller can be interupted by exchanging a processor module,on which the Ess LED is flashing.Do not remove processor modules with flashing Ess LED.A blinking Ess LED indicates that the processor module is required for the system tofunction.Even if the LED is not blinking, the system redundancies which this processor module ispart of, must be checked using SILworX. The communication connections processed by theprocessor module must also be taken into account.Please refer to the manual of the processor module HI 801 009 and to the system manualHI 801 001 for more details about replacing processor modules.Page 24 of 70HI 801 003 D Rev.2.0