7-1
Section
Hardware Faults
269
NT620S/620C Symptoms
Cause
Remedy
The PC mode changes to
the monitor mode.
In host link communications, the
NT620S/NT620C changes mode.
This is a specification of the NT620S/NT620C. If
using a PC that can also be connected via the NT
link, connect it in an NT link connection (with NT
link, the mode is not changed).
Graph displays are not
updated.
One of the values specified for
percentage displays (–100%, 0%, or
100%) is incorrect.
Set the percentage values again so that they
conform with the following relationship:
–100% value < 0% value < 100% value
Numeral display or
character-string display is
not displayed properly.
Nothing is displayed for
The memory table is allocated to the
host’s memory and so the display is
updated with the contents of the
host’s memory.
Do not allocate the contents of memory tables to the
host’s memory when using as fixed values.
Nothing is dis layed for
character-string display.
(The display contents of
the memory table are not
the same as the initial
values set with the
support tool.)
Memory table data was lost because
the voltage of the battery dropped.
Replace the battery and execute memory table
initialization. (Refer to 7-3-2 “Replacing the Battery”,
page 275 and 3-4-2 “Initialization of the Memory
Tables”, page 65.) If a battery is not used, set the
resume function to OFF. (Refer to 3-8-4 “Resume
Function”, page 87.)
su
ort tool.)
The resume function is set to ON
and so the initial values for image
memory are not reflected in the
memory table.
Execute memory table initialization. (Refer to 3-4-2
“Initialization of the Memory Tables”, page 65.) If the
resume function is not required, set it to OFF. (Refer
to 3-8-4 “Resume Function”, page 87.)
Only “
:
” symbols are
displayed in numeral
displays or numeral input
fields.
The numeral in the numeral memory
table has more digits than the
number of displayable digits.
Check the values of words for the PC to which the
numeral memory table is allocated.
If the number of digits in the numeral display or the
numeral input field is 4 or less, set the PC word
allocation for the numerical memory table to 1.
Summary of Contents for NT620C
Page 1: ...Cat No V033 E1 5 Programmable Terminals NT620S 620C OPERATION MANUAL...
Page 2: ...NT620S 620C Programmable Terminals Operation Manual Revised April 2001...
Page 3: ...iv...
Page 5: ...vi...
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