74
Alarm
code
Description
Reasons
Solutions
protection
848
DC
setting
abnormal
protection
The setting of DC is wrong.
Bit2-0 of ESC register 0981h (activation) is set to
a value other than the following:
bit2-0=000b , bit2-0=011b
ESM status after error reporting: PreOp
ESC register al status code:0030h
Confirm the setting of
DC
850
PLL
abnormal
protection
ESM status refers to the situation that the
communication and servo phases (PLL locking) do
not match under SafeOp or OP status
ESM status after error reporting: SafeOp
ESC register al status code:0032h
Confirm the setting of
DC and whether the
propagation delay
compensation and
deviation compensation
are correct.
853
Synchronization
cycle
setting
abnormal
protection
Set unsupported synchronization cycle:
The set value of synchronization cycle is beyond
500us, 1ms, 2ms and 4ms
ESM status after error reporting:PreOP
ESC register AL status code: 0035h
Set the
synchronization
period correctly
870
Data frame loss
alarm
Data frame loss
1. Check whether the
baud rate set in P9-02
matches the
communication card.
The default baud rate of
the general machine is
06.
2. When setting ECAT
communication
parameters, power on
again after
modification, otherwise
data frame loss may
occur.
3.After the firmware of
the communication card
or frequency converter
is updated, it needs to
be powered off and
restarted.
4. Check whether the
communication card
and the inverter
backplane are properly
inserted, or whether
there is interference at
the interface.
880
Internal
Expansion card and frequency converter failed to Check whether there are