User manual

Using SIMATIC PCS 7 OSx @aGlance 1-21
SIMATIC PCS 7 OSx 4.1.1 @aGlance
Table 1-1 PCS 7 OSx @aGlance Troubleshooting (continued)
Problem Solution
Invalid Parameters message appears.
Some fields, such as AttrRange, are o ptional for the client but not for
OSx. Check Section A.3 for special restrictions and fill in all necessary
fields. Also consult your online help or client software manuals.
Tag values do not agree exactly
with OSx database.
Expect rounding of values in data retrieval.
When an excessive number of RBE
messages are generated in OSx,
your client may not be able to keep
up. Hot links may stop updating.
Close and reopen the application and/or use fewer hot links or points
per hot link to lessen the load.
Server fails and @aGlance does not
work.
If OSx is s till running, change system s tate to Offline and then back to
Operate. If you want to write to tag values, you must log in again on the
client.
In order to restart the server o n the original station, transition OSx to
the Offline state and then back to Operate again. To avoid setting all
OSx stations Offline, you can follow these steps instead.
1. Set the station where the server has shut down to Out_of_Service.
2 . Shut do wn the s ta ti o n b y s e l e cti n g
Controls ->Change S ystem S tate
on the menu bar and choosing Shutdown OSx and Linux.
3. When the Power down message appears, power down the
station and power it back up again after 15 seconds. When the
station rejoins the system, it automatically resynchronizes with
the primary and restarts the @aGlance server.
Text values do not change to reflect
an empty string.
Use the Null2blank command to force client recognition of empty
strings. Refer to page 1-10, “Reading Null Text Strings.”
A hot link appears to have failed.
Values are not updating.
To verify that the hot link has failed, request a tag value through a cold
link and compare it with the hot link value.
Verify that the number of hot links has not exceeded 256.
Verify that the number of tag points per hot link has not e xceeded 16.
Check client error messages for corrective procedures.
The aag_admin utility does not
execute.
@aGlance does not require this utility.
Client unable to communicate with
server. Error message
AAG--E--SCKSET appears.
Add the following code to one of the source files of the client, and
recompile the client:
int getdtablesize(void)
{
return(60)
}
This overrides the standard library function getdtablesize() and returns
a value that the @aGlance libraries can successfully use. This affects
only those clients that run on an OSx station.