5.11 Standard Counter Function Blocks
5.11.3 Up/Down counter
5-201
5
APPLICATION
FUNCTIONS
CTUD(_E)
CTUD(_E)
Operation result
(1) Function without EN/ENO
An operation is executed and the operation value is output from , , and .
(2) Function with EN/ENO
The following table shows the executing conditions and operation results.
*1 The previous operation output value is held at , , and even if EN is FALSE.
EN ENO
, ,
TRUE (Operation execution) TRUE Operation output value
FALSE (Operation stop) FALSE
Previous output value
*1
d1
d2
d3
d1
d2
d3
d1
d2
d3
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