Omron CPM1 - PROGRAMING MANUAL 02-2001 Programming Manual page 191

Analog I/O Units
Analog I/O Unit
Connection
Range Analog input 1
code signal range
FF00 0 to 10 V
FF01 0 to 10 V
FF02 1 to 5 V or 4 to 20 mA
FF03 1 to 5 V or 4 to 20 mA
FF04 0 to 10 V
FF05 0 to 10 V
FF06 1 to 5 V or 4 to 20 mA
FF07 1 to 5 V or 4 to 20 mA
Write the range code to the Analog I/O Unit's output word (n + 1) in the first cycle
of program execution.
SR 25315 First Cycle Flag
ON for 1 cycle
(n + 1)
The Analog I/O Unit will not start converting analog I/O values until the range
code has been written.
Once the range code has been set, it is not possible to change the setting while
power is being supplied to the CPU Unit. To change the I/O range, turn the CPU
Unit OFF then ON again.
Note If a range code other than those specified in the above table is written to n+1, the
range code will not be received by the Analog I/O Unit and analog I/O conversion
will not start.
This section describes how to connect an Analog I/O Unit to the CPU Unit.
A maximum of 3 Expansion Units or Expansion I/O Units, including Analog I/O
Units, can be connected to one PC. When the Analog I/O Unit is used in com-
bination with other Expansion Units or Expansion I/O Units, there are no restric-
tions on the connection order.
I/O Allocation
I/O is allocated for the Analog I/O Unit in the same way as other Expansion Units
or Expansion I/O Units starting from the next word following the last allocated
word on the CPU Unit, or previous Expansion Unit or Expansion I/O Unit. When
"m" is the last allocated input word and "n" the last allocated output word on the
Analog input 2
signal range
0 to 10 V
0 to 10 V
0 to 10 V
0 to 10 V
1 to 5 V or 4 to 20 mA
1 to 5 V or 4 to 20 mA
1 to 5 V or 4 to 20 mA
1 to 5 V or 4 to 20 mA
(21)
Analog input 1:
Analog input 2:
Analog output:
Range code (4-digit hexadecimal)
CPM1/CPM1A/CPM2A
CPU Unit
Section
Analog output
signal range
0 to 10 V or 4 to 20 mA
–10 to 10 V or 4 to 20 mA
0 to 10 V or 4 to 20 mA
–10 to 10 V or 4 to 20 mA
0 to 10 V or 4 to 20 mA
–10 to 10 V or 4 to 20 mA
0 to 10 V or 4 to 20 mA
–10 to 10 V or 4 to 20 mA
1 to 5 V/4 to 20 mA
0 to 10 V
0 to 10 V/4 to 20 mA
Analog I/O Unit
3-1
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