YASKAWA G7 Series Technical Manual page 394

Display
MODBUS Communications Error
CE
Normal reception was not possible for
(blinking)
modbus
2 s or longer after received control
Com Err
data.
Option Card Communications
Error
BUS
A communications error occurred in a
(blinking)
Option
mode where the run command or a
Com Err
frequency reference is set from an
Communications Option Card.
CALL
Communications on Standby
(blinking)
Control data was not normally
Com
received when power was turned ON.
Call
SI-F/G Communications Error
Detected
E-15 A communications error was detected
SI-F/G when a run command or frequency
Com Err reference was set from an Option Card
and continuous operation was set for
the E-15 operation selection.
-12
7
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Table 7.2 Alarm Displays and Processing (Continued)
Meaning Probable causes
Check the communications devices
-
and signals.
Check the communications devices
-
and signals.
Check the communications devices
-
and signals.
- Check the communications signals.
Corrective Actions