NT31C-ST143B-EV3 Omron, NT31C-ST143B-EV3 Datasheet - Page 250

• Manufacturer Part Number: NT31C-ST143B-EV3
• Description: 5.7,8-color,dis,stn,black,eng
• Manufacturer: Omron

Specifications of NT31C-ST143B-EV3

• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

Troubleshooting
The graph display does not
change.
The trend graph display
does not agree with the
actual time axis.
The Programming Console
function cannot be used.
The Device Monitor func-
tion cannot be used.
The memory table display
contents differ from the ini-
tial value set at the Sup-
port Tool.
Updating of numeric val-
ues and text is delayed.
NT31/NT31C Symptoms
One of the percentage display set-
tings — −100%, 0%, or 100% — is
incorrect.
The cycle for graph display update
processing is longer than the set
sampling cycle.
The communications settings are
incorrect.
A Programming Console is con-
nected.
The PLC does not support the Pro-
gramming Console function.
The system program for other ven-
dor’s PLCs has been installed. (PLC
models other than OMRON.)
The communications settings are not
correct.
The PLC does not support the Device
Monitor function.
The system program installed in the
PT is for a PLC maker other than
OMRON.
Since the memory table is allocated
to the host memory, the display is
updated in accordance with the con-
tents of the host memory.
The battery voltage has dropped and
the data in the memory table has
been destroyed.
Since ON is set for the resume func-
tion, the initial values of the screen
data memory are not written to the
memory tables.
The numeral memory table is speci-
fied as the destination for a mathe-
matical table’s results.
Malfunction due to external noise
There are too many numeral/text dis-
plays on the displayed screen.
The cycle time is extended due to
heavy processing at the host.
In an RS-422A/485 connection, there
is illegal branching or an erroneous
terminator setting.
Cause
Set the −100%, 0%, and 100% values in the following
relationship:
−100% value < 0% value < 100% value
Delete other elements on the same screen as the
trend graph that are allocated to the host and have a
high update frequency. Or lengthen the sampling
cycle.
Set the communications method as follows when
using the Programming Console function.
With C-series PLC: 1:1 NT Link
With CS/CJ-series PLC:
1:N NT Link (standard or high-speed)
It is not possible to use a Programming Console and
the Programming Console function at the same time.
Disconnect the Programming Console.
Not all PLCs support the Programming Console func-
tion. Check the model of PLC you are using. (6-12
Programming Console Function)
The Programming Console function can be used only
when the system program for OMRON PLCs is
installed. Install the correct system program.
Set the communications method as follows when
using the Device Monitor function.
With C-series PLCs: 1:1 NT Link or 1:N NT Link
With CS/CJ-series PLCs:
1:N NT Link (standard or high-speed)
Not all PLCs support the Device Monitor function.
Check the model of PLC you are using. Refer to 6-13
Device Monitor Function for details.
The Device Monitor function can be used only when
the PT is connected to a PT with the system program
for OMRON PLCs installed. Install a system program
that supports the Device Monitor function.
When the contents of the memory table are set as a
fixed value, do not allocate the memory table to the
host.
Replace the battery and execute memory table initial-
ization. (7-3-1 Replacing the Battery, page 243, and
6-4-5 Initializing the Memory Tables, page 147)
Execute memory table initialization. (6-4-5 Initializing
the Memory Tables, page 147)
If the resume function does not need to be used, use
the NT31/NT31C with the resume function OFF. (6-9-
10 Setting the Resume Function, page 182)
Calculations are executed continuously while the PT
is operating and the calculation results are automati-
cally written to the memory table. Specify another
numeral memory table or a word in the host.
Carry out grounding work in accordance with the
conditions by referring to 3-1-4 Grounding, page 32.
Reduce the number of numeral/text displays on the
screen for which updating is delayed.
Shorten the host cycle time.
Wire correctly by referring to SECTION 5 Connecting
to the Host from the RS-422A/485 Port.
Remedy
Section 7-1
233