IDEC MicroSmart - Manual (Page 406)

24: A NALOG I/O C ONTROL
24-20 « FC4A M ICRO S MART U SER ’ S M ANUAL »
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Analog Output Module FC4A-K1A1 on Slot 3
Ladder Diagram
As shown in the ladder diagram below, when initialize pulse special internal relay M8120 is used for the ANST macro in
parallel with another instruction, load M8120 again for the other instruction.
Note: The above ladder diagram is only an example and should be modified as required.
DR Allocation Range Designation Description
D760 - D779 — Automatic range allocation, 20 words
I/O Channel Item Designation Description
OUT CH0
Signal Type 0 to 10V DC Voltage output
Data Type Binar y data 0 to 4095
M8120 is the initialize pulse special internal relay.
When the CPU star ts to run, ANST stores parameters to
data registers to configure analog I/O modules and Q30
is turned on.
When I0 is turned on, analog input data is moved from
D676 to D1000.
The temperature is compared with the alarm tempera-
ture of 100°C.
When the temperature is higher than 100°C, Q30 is
turned off.
When the temperature is not higher than 100°C, Q30 is
turned on.
Analog input data of –500 to +1500 is conver ted to 0 to
2000.
Analog input data of 0 to 2000 is conver ted to 0 to
4000.
Analog input data of 0 to 4000 is moved to D772 (ana-
log output data) of the analog output module.
M8120
REP S1 –
D676
D1 –
D1000
MOV(I)
REP S1 –
D1000
D1 –
D772
MOV(W)
REP S1 –
D676
D1 –
M30 CMP>(I) S2 –
1000
NO.1
J8AT1
NO.3
K1A1
ANST
Q30
S
Q30
R
Q30
S
M30
M30
I0
REP S2 –
500
D1 –
D1000
S1 –
D1000
ADD(I)
REP S2 –
2
D1 –
D1000
S1 –
D1000
MUL(W)
M8120