Example of DI operation
In function block FB 1, STEP 5 operations are executed whose operation
codes were transferred
by a calling block as formal operands FW 10, FW 12 and FW 14.
Which of the operation codes is executed is written by the calling block
as a consecutive number in flag word
FW 16.
The result of the executed operation is then entered in ACCU 1 and is
transferred to flag word FW 18.
FB 1
NAME :TEST
DECL :FW10 I/Q/D/B/T/C: D KM/KH/KY/KS/KF/KT/KC/KG: KH
DECL :FW12 I/Q/D/B/T/C: D KM/KH/KY/KS/KF/KT/KC/KG: KH
DECL :FW14 I/Q/D/B/T/C: D KM/KH/KY/KS/KF/KT/KC/KG: KH
:L FW 16 cons. number of formal operand
: with required operation code
:DI transferred operation code is executed
:T FW 16 result from ACCU 1
:BE
FB 2
:
:L KF +1
:T FW 16 cons. no. of formal operand with operation code
:JU =AUFR
:
:
AUFR :
:JU FB 1 call FB TEST
NAME :TEST
FW10 : KH 4A5A op. code "L IB 90", formal operand 1
FW12 : KH xxxx other operation code, formal operand 2
FW14 : KH yyyy other operation code, formal operand 3
:T FW 18 ACCU 1
→ FW 18
:BE
FW 10
4A5AH
:L IB 90
0001H
0001H
List of actual operands in FB 2 Principle of sequence in FB 1
xxxxH
yyyyH
Operationexecutedwith"DI"
(cons. no. of actual operand)
FW 12
FW 14
FW 16
ACCU 1
:L FW 16
:DI
Executive Operations
CPU 948 Programming Guide
C79000-G8576-C848-04
3 - 71
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