92
SC-F70
SC-F70
PID Operation Operating Instructions
7.3 No Error-Displayable Problems
This guide helps you analyze a problem when no error messages are
displayed. Find your symptom in the left column, analyze it, and take
action.
Make sure the correct line
voltage is being applied.
Make sure the power
connection is to the proper
terminals.
Make sure that there is no noise
source near the controller.
An analog setting input signal
has been entered in parallel to
multiple SC-F70 units using a
grounded thermocouple.
Make sure the setting for
measurement input range is
correct.
Check whether a measured
input bias has been set.
Make sure that the analog
setting input range is correct.
Make sure that a setting input
bias has not been set.
Supply the correct line voltage.
Connect the power to the terminals
1, 2, and 3.
Move the noise source away from
the controller.
Insert an isolator, etc. to ensure that
an insulated analog setting signal is
input to each unit.
Set the measurement input range by
referring to the parameter PG02 on
page 69.
Reset the bias to 0 (only if the
measurement input bias can be
changed) by referring to the
parameter PG02 on page 69.
Set the analog setting input range
correctly.
See parameter PG05 on page 75.
Change the setting input bias to 0
(only if the setting input bias may
be changed).
See parameter PG05 on page 75.
Analysis
Display Symptom
Action
No displays appear.
Displays are abnormal.
Measured value
displays differ from
actual value.
Analog setting input
values differ from
actual values.
