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8 Using Expansion Units and Expansion I/O Units
8-24
CP1E CPU Unit Hardware User’s Manual(W479)
(3) Writing Analog Output Conversion Values
The ladder program can be used to write conversion data to the output words.
When “n” is the last output word allocated to the CPU Unit, or previous Expansion Unit or
Expansion I/O Unit, the output words will be n+1 to n+2 for CP1W-DA021 and n+1 to n+4
for CP1W-DA041/DA042.
(4) Startup Operation
After power is turned ON, it will require two cycle times plus approximately 50 ms before the
first conversion data is output.
The following table shows the output status after the initial processing is completed.
Therefore, create a program as shown below, so that when operation begins simulta-
neously with startup it will wait for valid set data.
(5) Handling Unit Errors
•
When an error occurs at the Analog Output Unit, the analog output will be 0 V or 0 mA.
If a CPU error or an I/O bus error (fatal errors) occurs at the CPU Unit and the analog
output is set to 1 to 5 V or 4 to 20 mA, 0 V or 0 mA will be output. For any other fatal
errors at the CPU Unit, 1 V or 4 mA will be output.
•
Expansion Unit and Expansion I/O Unit errors are output to bits 0 to 5 of word A436 for
units 1 to 3. The bits are allocated from A436.00 in order starting from the Unit nearest
the CPU Unit. CP1W-DA041/DA042 is allocated two bits each and CP1W-DA021 is allo-
cated one bit each. Use these flags in the probgram when it is necessary to detect
errors.
Output type
Voltage output
Current output
Output range
0 to 10 V,
-10 to +10 V
1 to 5 V
0 to 20 mA
4 to 20 mA
Before range code
is written
0V
0mA
After range code is
written
0V
1V
0mA
4mA
P_On
MOV
D100
102
TIM
0005
#0002
T0005
Always ON Flag
TIM0005 is started when the power is turned
ON. After 0.2 s (200 ms) elapses, the TIM0005
contact turns ON and the data stored in D100
will be moved to CIO 102 as the conversion
data for analog output 1.
Summary of Contents for CP1E-E**D Series
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Page 66: ...2 Basic System Configuration and Devices 2 22 CP1E CPU Unit Hardware User s Manual W479...
Page 318: ...Appendices A 54 CP1E CPU Unit Hardware User s Manual W479...
Page 322: ...Index 4 CP1E CPU Unit Hardware User s Manual W479...
Page 324: ...Revision 2 CP1E CPU Unit Hardware User s Manual W479...
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