set
=M170.3
CALL,FC21
Enable:=M170.3
Funct:=B#16#4
S7Var:=P#DB100.DBX12.0 REAL 4
IVAR1:=20
IVWR2:=-1
Error:=M171.3
ErrCode:=DB100.DBW94
set
=M170.1
CALL,FC21
Enable:=M170.1
Funct:=B#16#3
S7Var:=P#DB100.DBX70.0 REAL 5
IVAR1:=0
IVWR2:=-1
Error:=M171.1
ErrCode:=DB100.DBW92
最佳答案
CALL,FC21
Enable:=M170.3–>触发条件
Funct:=B#16#4–>功能为写
S7Var:=P#DB100.DBX12.0 REAL 4–>DB100.DBD12,DB100.DBD16,DB100.DBD20,DB100.DBD24
IVAR1:=20–>$A_DBR[20],$A_DBR[24],$A_DBR[28],$A_DBR[32]
IVWR2:=-1
Error:=M171.3—>错误标识
ErrCode:=DB100.DBW9–》错误代码
另外个读类似我就不详细写了
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