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8-51
8 Using Expansion Units and Expansion I/O Units
CP1E CPU Unit Hardware User’s Manual(W479)
8-3 An
alog
I/O U
n
its
8
8-3
-2 C
P
1W-
M
AD42/CP1W-
M
A
D
44 Analog I/O
Units
Additional Information
When external power is supplied (when setting the range code), or when there is a power inter-
ruption, a pulse-form analog output may be generated.
If this causes problems with operation, take countermeasures such as those suggested below.
(1) Countermeasure 1
•
Turn ON the power supply for the CP1E CPU Unit first, confirm correct operation, and
then turn ON the power supply for the load.
•
Turn OFF the power supply for the load before turning OFF the power supply for the
CP1E CPU Unit.
(2) Countermeasure 2
•
Control the machine not only by analog output but also by other signals (additional
start/stop control signal for machine).
3
Create the ladder program.
(1) Allocating I/O Words
Four input words and two output words are allocated to the CP1W-MAD42, starting from
the next word following the last word allocated to the CPU Unit or previous Expansion Unit
or Expansion I/O Unit.
Four input words and four output words are allocated to the CP1W-MAD44, starting from
the next word following the last word allocated to the CPU Unit or previous Expansion Unit
or Expansion I/O Unit.
(2) Writing the Range Code
(a) CP1W-MAD42
Write the set data to words (n+1 to n+2). A/D or D/A conversion begins when the set
data is transferred from the CPU Unit to the Analog I/O Unit. Setting contents are
shown as the following table.
Word (n+1)
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
Value
1
0
0
0
Analog output 1
Analog input 2
Analog input 1
Word (n+2)
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
Value
1
0
0
0
Analog output 2
Analog input 4
Analog input 3
CP1W-MAD42
Word m+1
Word m+2
Word m+3
Word m+4
Word n+1
CP1W-MAD44
Word m+1
Word m+2
Word m+3
Word m+4
Word n+1
Word n+2
Word n+2
Word n+3
Word n+4
Summary of Contents for CP1E-E**D Series
Page 3: ......
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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