Protective and Diagnostic Functions
7-
11
(blink-
ing)
External Fault (Input Terminal S3)
An external fault was input from a
multi-function input terminal (S3 to
S8).
• Reset external fault inputs to the
multi-function inputs.
• Remove the cause of the external
fault.
(blink-
ing)
External Fault (Input Terminal S4)
(blink-
ing)
External Fault (Input Terminal S5)
(blink-
ing)
External Fault (Input Terminal S6)
(blink-
ing)
External Fault (Input Terminal S7)
(blink-
ing)
External Fault (Input Terminal S8)
(blink-
ing)
PID Feedback Reference Lost
A PID feedback reference loss was
detected (b5-12 = 2) and the PID feed-
back input was less than b5-13 (PID
feedback loss detection level) for
longer than the time set in b5-14 (PID
feedback loss detection time).
The settings in b5-13 and b5-14 aren’t
appropriate.
Check the settings in b5-13 and b5-
14.
The wiring of the PID feedback cir-
cuit is incorrect.
Fix the wiring.
(blink-
ing)
MEMOBUS Communications Error
Normal reception was not possible for
2 s or longer after received control
data.
-
Check the communications devices
and signals.
(blink-
ing)
Option Board Communications
Error
A communications error occurred in a
mode where the Run Command or a
frequency reference is set from a
Communications Option Board.
-
Check the communications devices
and signals.
(blink-
ing)
Communications on Standby
Control data was not normally
received when power was turned ON.
-
Check the communications devices
and signals.
(blink-
ing)
Reset during Run Command Input
Error
The reset signal was input during Run
Command input from an external ter-
minal or other source.
-
Check that a Run Command is not
being input from an external terminal
or other source.
(blink-
ing)
SI-T Watchdog Error Detected
A Watchdog error was detected when
the Run Command or a frequency ref-
erence was set from an option board
and continuous operation was set for
the E5 operation selection.
Synchronization error between master
controller and Inverter for control
data.
Check the communications timing
such as communications cycle. *
Table 7.2 Alarm Displays and Processing (Continued)
Display
Meaning
Probable causes
Corrective Actions