Omron CP1L - 12-2007, Operation Manual

Page: 458 / 673

423
Analog I/O Units
Section 7-4
Handling Unit Errors
• When an error occurs in the Analog I/O Unit, analog input data will be
0000 and 0 V or 4 mA will be output as the analog output.
• Expansion Unit/Expansion I/O Unit errors are output to bits 0 to 6 of word
A436. The bits are allocated from A436.00 in order starting with the Unit
nearest the CPU Unit. Use these flags in the program when it is neces-
sary to detect errors.
Programming Example
This programming example uses these ranges:
Analog input 0: 0 to 10 V
Analog input 1: 1 to 5 V or 4 to 20 mA
Analog output: 0 to 10 V or 4 to 20 mA
MOV(021)
2
D0
0
Always ON
P_On
TIM
T0
TIM 0 will start as soon as power turns ON.
After 0.2 to 0.3 s (200 to 300 ms), the input for
TIM 0 will turn ON, and the converted data
from analog input 0 that is stored in word 2
will be transferred to D00000.
#3
MOV(021)
#FF04
102
First Cycle ON Flag
A200.11
Always ON Flag
P_On
10
D0
T0
T0
MOV(021)
3.15
110.00
3
D1
T0
MOV(021)
D10
102
T0
MOV(021)
Execution
condition
Execution
condition
Execution
condition
Execution
condition
←
Writes the range code (FF04) to the Unit.
←
Reads analog input 0's converted value.
Open-circuit alarm
←
Reads analog input 1's converted value.
←
The content of D10 is written to the output
word as the analog output set value.
0
TIM
#3