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Appendix B
Troubleshooting and Common Questions
©
National Instruments Corporation
B-17
NI-FBUS Hardware and Software User Manual
Lookout
1.
Create one or more
OPCClient
objects in your Lookout process.
2.
Select the NIFB_OPCDA.3 server from the drop-down list of
OPC servers.
3.
Set the Activate member of the OPC client object to FALSE using
one of the following methods:
•
Edit the connections for the
OPCClient
object and set the
Activate member to FALSE.
•
Create a switch object on the Control Panel with the position
source set to Remote. Then, set the Remote source to the Activate
member of the
OPCClient
object. Leave edit mode, then set the
switch to the off (FALSE) position.
4.
Add all the items you are interested in to the
OPCClient
object(s).
Array
Boolean
VT_ARRAY | VT_BOOL
Integer8
VT_ARRAY | VT_I1
Integer16
VT_ARRAY | VT_I2
Integer32
VT_ARRAY | VT_I4
Unsigned8
VT_ARRAY | VT_UI1
Unsigned16
VT_ARRAY | VT_UI2
Unsigned32
VT_ARRAY | VT_UI4
Floating Point
VT_ARRAY | VT_R4
Visible String
VT_ARRAY | VT_BSTR
Octet String
—
Date
VT_ARRAY | VT_DATE
Time of Day
VT_ARRAY | VT_DATE
Time Difference
VT_ARRAY | VT_DATE
Bit String
—
Time Value
VT_ARRAY | VT_DATE
Table B-7.
OPC Data Type Mapping Rule (Continued)
Meta Type
FMS Standard
Data Types
OPC Data Type