145 / 182
ROC800-Series Instruction Manual
6-8
Inputs and Outputs
Revised Jul-14
9.
Remove the test equipment.
6.3.4 Troubleshooting Analog Output Modules
Equipment Required
:
Multimeter.
PC running ROCLINK 800 software.
Caution
Failure to exercise proper electrostatic discharge precautions, such as
wearing a grounded wrist strap may reset the processor or damage
electronic components, resulting in interrupted operations.
To calibrate the module:
1.
Connect a multimeter between the + and – channel terminals of the
module and set the multimeter to measure current in milliamps.
2.
Connect to ROCLINK 800 software.
3.
Select
Configure
>
I/O
>
AO Points
. The Analog Output screen
displays.
Note
:
You can also click the graphic image of the module to display
this screen.
4.
Select the appropriate Analog Outputs Point mumber.
5.
Select
Auto
as the Scanning Mode and click
Apply
.
6.
Set the Auto Value field to either the value in the
High Reading EU
field or
100
and click
Apply
. The multimeter should read 20 mA.
7.
Select the
Advanced
tab on the Analog Output screen.
8.
Record the displayed values in the Adjusted D/A 100% and Adjusted
D/A 0% fields.
9.
Increase or decrease the value in the
Adjusted D/A 100%
field until
the multimeter reads 20 mA. (This calibrates the High Reading EU
value.) Click
Apply
.
Note
:
This step may require some experimentation.
10.
Select the
General
tab on the Analog Output screen.
11.
Set the Auto Value field to either the value in the
Low Reading EU
field or
0
and click
Apply
. The multimeter should read 4 mA.
12.
Select the
Advanced
tab on the Analog Output screen.
13.
Increase or decrease the value in the
Adjusted D/A 0%
field until the
multimeter reads 4 mA. (This calibrates the Low Reading EU value.)
Click
Apply
.
Note
:
This step may require some experimentation.