6. Function blocks6.2 Interrupt function blocks6.2 Interrupt function blocks6.2.1 IC - Counter-controlled interrupt function blockOnly possible with easySoft 7.6.2.1.1 GeneraleasyE4 base devices provide 8 counter-controlled interrupt functionblocks, IC01 through IC08. This does not apply to the EDP programminglanguage.easyE4 makes it possible to quickly respond to various events. Thismakes it possible, for instance, to switch outputs on or off outside of themain program's routine. Only bit operators are allowed within an inter-rupt program.The following events can trigger an interrupt:l Reaching counter reference values, two-channel, device inputs I1through I8, function blocks IC1 through IC8l Frequency measurement, reference value exceeded or fallen below,device inputs I1 through I8, function blocks IC1 through IC8Execution time for an interruptThe time between the moment the event is detected and the momentthere is a response at a device output is < 1 ms. To this end, the basedevice's QP physical output must be set.If multiple interrupts are executed simultaneously, the times add up.NOTICEUse each device input from I1 to I8 only once in each inter-rupt function block. Otherwise, an error message will beoutput during the plausibility check and it will not be pos-sible to load the program onto the device.In total, no more than 8 interrupt sources are allowed to beprocessed in a single program. The valid interrupt sourcesare the IC, IE, IT interrupt function blocks and the CF, CH,and CI high-speed counters that are directly connected tothe device inputs.easyE4 11/18 MN050009 EN www.eaton.com 405
