Delta Electronics DVP15MC11T

Chapter 8 Logic Instructions
8_
8.3.5 SEMA
FB/FC
Explanation
Applicable
model
FB
SEMA is used for giving priority to CLAIM. (The output will be valid in the
second period.)
DVP15MC11T
 Parameters
Parameter
name
Meaning
Input/
Output
Description Valid range
CLAIM
Input
signal
Input
Set signal TRUE or FALSE
RELEASE
Input
signal
Input
Reset signal TRUE or FALSE
Q
Output
signal
Output Output signal TRUE or FALSE
Boolean
Bit string Integer
Real
number
Time, date
String
BOOL
BYTE
WORD DWORD
LWORD
USINT UINT UDINT ULINT SINT INT DINT LINT REAL LREAL TIME DATE TOD DT STRING
CLAIM
●
RELEASE
●
Q
●
Note:
The symbol ● indicates that the parameter is allowed to connect to the variable or constant of the data type.
 Function Explanation
When CLAIM of SEMA is TRUE, Q is TRUE. When RELEASE is TRUE, Q is FALSE. When CLAIM and
RELEASE are both TRUE, Q is TRUE.
 Precautions for Correct Use
When CLAIM is TRUE, Q will be TRUE in the second period.

Programming Example
 The variable table and program
Variable name Data type Initial value
SEMA1
SEMA
SEMA1_EN
BOOL
FALSE
SEMA1_CLAIM
BOOL
FALSE
SEMA1_RELEASE
BOOL
FALSE
SEMA
EN ENO
CLAIM
Q
SEMA_insta nce
RELEASE
8-15