6. Function blocks
6.2 Interrupt function blocks
For more information, please refer to → "CF - Frequency counter", page 310, → "CH -
High-speed counter", page 316 , → "CI - Incremental counter", page 322 as well.
For function blocks IE01 – IE08 and IC01 – IC08, device inputs I01 – I08 can be
assigned freely.
For function blocks IT01 – IT08, an interrupt that is not yet in use is assigned in
easySoft 8. The interrupt sources used by the CF, CH, and CI high-speed counters are
also considered to be in use within this context.
Each device input and each interrupt source can only be used once.
Exceptions:
l
For CI01, the instance of I02 can be used by an IT interrupt function block.
l
For CI02, the instance of I04 can be used by an IT interrupt function block.
l
For each interrupt function block IC, the instance of the second input of an IT
function block can be used if the Counter with 2 counter inputs mode has not
been selected.
These exceptions are taken into account by the plausibility check and by the pro-
gram compilation routine in easySoft 8. The maximum number of 8 interrupts is also
taken into account within this context.
 Device inputs
 I01 I02 I03 I04 I05 I06 I07 I08
Interrupt source








CF01 frequency
counter
x







CF02 frequency
counter

x






CF03 frequency
counter


x





CF04 frequency
counter



x




CH01 high-speed
meter
x







CH02 high-speed
meter

x






CH03 high-speed
meter


x





CH04 high-speed
meter



x




CI01 incremental
counter
x
x






CI02 incremental
counter


x
x




IE01…IE08
One input, I01 – I08 can be assigned freely (max. 8, none can be assigned more than
once)
IC01 – IC08
Two inputs, I01 – I08 can be assigned freely (max. 8, none can be assigned more than
once)
568
easyE402/24 MN050009ENEaton.com
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