是这样的,我们这有一个PLC系统,别人编的程序,现在有一个LD 200.11,不知是何意思?然后编译时老说这一条无效助记符
追答LD指令,邦助中一查就知道了,但不知“无效助记符”怎么办
LD - Load
Variations:
Differentiate Up
Differentiate Down
Immediate Refresh
Immediate Refresh/Differentiate Up
Immediate Refresh/Differentiate Down
Note: Immediate Refreshing is not supported by the CS1D CPU Units.
See Variations for more information.
Purpose:
Indicates a logical start and creates an ON/OFF execution condition based on the ON/OFF status of the specified operand bit.