![background image](http://html1.mh-extra.com/html/omron/prt1-com/prt1-com_operation-manual_744566142.webp)
7-2
Section
Analog Output Units
132
Pins 8 and 9 of the DIP switch determine the status of the outputs after a
communications error occurs in CompoBus/D or I/O Unit interface
communications.
Settings
Output status after communications error
Pin 8
Pin 9
p
OFF
OFF
Clear at minimum (Clear at the lower limit of the output signal
range.)
OFF
ON
Clear at maximum (Clear at the upper limit of the output signal
range.)
ON
OFF
Clear at 0 V (for --10 to 10 V only)
Clear at minimum (other than the above)
ON
ON
Hold (Maintain previous output status.)
When the clear at minimum, clear at maximum, or clear at 0 V setting is used, the
output data is as shown in the following table.
Output signal
range
Clear at minimum
Clear at
maximum
Clear at 0 V
0 to 5 V
--0.25 V
5.25 V
--0.25 V
1 to 5 V
0.8 V
5.2 V
0.8 V
0 to 10 V
--0.5 V
10.5 V
--0.5 V
--10 to 10 V
--11 V
11 V
0 V
Output the converted data to the Master as shown in the following diagram.
Bit
First word
First word + 1
First word + 2
First word + 3
Output 0 data
Output 1 data
Output 2 data
Output 3 data
When a negative voltage is to be output, specify the conversion data as the two’s
complement. To obtain a two’s complement from an absolute value, the NEG
instruction is useful.
The conversion data is refreshed every 4 ms for all 4 points.
Dimensions
(Unit: mm)
Approx. 70
110
60
65
37.
4
27.
6
4
35
12.
6
Output Status after
Communications Error
Converted Data
Conversion Time