PCS7中数组能不能设置S7_m_c属性？
最佳答案
S7_m_c只支持简单类型的数据，数组是不支持的；
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S7_m_c Attribute
Parameter system attribute for:
IN/OUT/IN_OUT parameters for function blocks, system function blocks, shared data blocks, data
blocks derived from a user-defined data type, instance data blocks, global data blocks, charts.
Permitted parameter data types:
BOOL, BYTE, CHAR, DINT, DWORD, INT, REAL, STRING, WORD, BLOCK_xx, TIME, SDTIME
STRING is only permitted in the instance DB as an IN or OUT parameter, since only a pointer is
stored in the instance data block for VAR_INOUT. STRING is also permitted in the shared DB
(VAR).
Description:
The parameter can be read/written from the control level (OS). The operator interface system uses
the system attribute to determine how the data structure for the corresponding run-time object is to
be created.
Value range:
S7_m_c:='true'
S7_m_c:='false' (applies when the attribute has not been defined)
提问者对于答案的评价：
谢谢 dcount107！
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