Omron NS7 Series Setup Manual page 193

Errors during Object Operation
Symptoms at
Causes
PT
The numerical Communications
and character are unstable due to
string update external noise.
is slow.
There are too many
Numeral Display &
Input objects and
String Display &
Input objects in the
display.
For RS-422A com-
munications, the
branch is incorrect
or the terminating
resistance is not
set properly.
The host is proc-
essing a large vol-
ume of data and
the cycle time is
long.
The message
communications
interval is too long.
Some objects A communications
in the screen error has occurred.
configuration
are not dis-
played.
Some objects The control flags
in the screen set in the object
configuration include Hide Dis-
are not dis- play Flags.
played.
The Log Flag The communica-
display does tions address set
not match the for the event of log
actual log timing is turning ON
timing. and OFF at high
speed.
Cannot input The numerical
numerical val- value input upper
ues. and lower limit
check function is
running.
Cannot input The control flags
for some func- set in the objects
tional objects. include Input Pro-
hibit Flags.
A password has
been set.
7-3 Troubleshooting and Maintenance
Measures
Perform noise countermeasures such as separating com-
munications cables from power lines.
Reduce the number of Numeral Display & Input and String
Display & Input objects in the screen where update is slow.
Wire correctly, referring to Appendix 4 Using NS-AL002 RS-
232C/RS-422A Converters.
Shorten the host cycle time.
On the NS-Designer, select Settings - System Setting,
click the Comm-All Tab, press the Comm. Details Button,
and set a shorted communications interval. (Refer to Sec-
tion 7 System Settings of the NS-Designer Operation Man-
ual.)
Check the communications settings again.
Display the control flags for the objects set to be not dis-
played, as follows:
Display the Expansion Tab from the functional object prop-
erty setting using the NS-Designer. Select Display from
Display/Hide in the Control Flags Tab Page.
Turn ON the indirect address of the control flag set for the
object.
Set the ON/OFF cycle of the communications address for
events to a longer time.
Display the Expansion Tab from the functional object prop-
erty setting using the NS-Designer. Check the set values in
the Input Upper and Lower Limits Tab Page and correct if
necessary.
Display the Expansion Tab from the functional object prop-
erty settings using the NS-Designer. Select Enable for Input
in the Control Flag Tab Page.
Turn ON the indirect address of the control flag set for the
object.
Input the password in the password input dialog box that is
displayed.
7-11