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Statement Descriptions Section 5-5
• Function block (call destination) variable settings
The function block (call destination) has the following variables, and
the following values are passed with the call source (ST program, SFC
program, or call source function block).
Examples
■ Example of Entry Method 1
Instance_FB(EN:=A,FB_IN1:=IN1,FB_IN2:=IN2,FB_IN3:= IN3,
FB_OUT1=>OUT1,FB_OUT2=> OUT2,FB_OUT3=> OUT3,ENO=>B)
• It is all right for the arguments and return values to be listed in irregular
order.
• The input variables' arguments must be at the beginning of the list, or just
after the EN variable if the EN variable is listed.
• Output variables may be omitted if the data is not used.
• Specification method 2 cannot be used together with specification method
A in the same function block call statement.
■ Examples of other Entry Formats
• EN not entered:
Instance_FB(FB_IN1:=IN1,FB_IN2:=IN2,FB_IN3:= IN3,
FB_OUT1=>OUT1,FB_OUT2=> OUT2,FB_OUT3=> OUT3,ENO=>B)
• EN and ENO not entered:
Instance_FB(FB_IN1:=IN1,FB_IN2:=IN2,FB_IN3:= IN3,
FB_OUT1=>OUT1,FB_OUT2=> OUT2,FB_OUT3=> OUT3)
• ENO not entered:
Instance_FB(EN:=A,FB_IN1:=IN1,FB_IN2:=IN2,FB_IN3:=IN3,
FB_OUT1=>OUT1,FB_OUT2=>OUT2,FB_OUT3=>OUT3)
• FB_OUT2 data not required:
Instance_FB(EN:=A,FB_IN1:=IN1,FB_IN2:=IN2,FB_IN3:=IN3,
FB_OUT1=>OUT1,FB_OUT3=>OUT3,ENO=>B)
Internal variables A
Note Data type: BOOL
Passed to EN.
B
Note Data type: BOOL
Received from ENO.
Internal variables
(instance)
Instance_FB
Note Data type: FUNC-
TIONBLOCK
Calling function block definition:
Function block 2
Variable type Function block (call
destination) variable name
Values received from (or
passed to) variables in the
calling function block
Input variables FB_IN1 Received from IN1.
FB_IN2 Received from IN2.
FB_IN3 Received from IN3.
Output variables FB_OUT1 Passed to OUT1.
FB_OUT2 Passed to OUT2.
FB_OUT3 Passed to OUT3.
Variable type Function block (call
source) variable name
Values passed to (or received
from) variables in the called
function block
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