24: ANALOG I/O CONTROL
« FC4A MICROSMART USER’S MANUAL » 24-21
Changing Analog Output While CPU is Stopped
When using the FC4A-K2C1 analog output module, the analog output value can be changed while the CPU module is
stopped. To change the analog output value, store a required output value to the memory addresses allocated to the analog
output data.
Example: Memory Allocation of Ladder Refresh Type Analog Output Module FC4A-K2C1
STPA instruction when FC4A-K2C1 is mounted on slot 4
Ladder Diagram
Note: The above ladder diagram is only an example and should be modified as required.
Precautions for Programming ANST Macro
When using the ANST macro, do not make a branch from the ladder line of the ANST macro.
Delete the branch from the ANST macro, and start another line by inserting a LOD instruction.
Memory Address
(data address used for STPA)
Data Size
(bytes)
R/W Parameter
+20 2 R/W
Analog Output Data
CH0
+22 2 R/W CH1
MOV stores output values at the OFF state.
output value of the analog output module.
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