7.1 Communication Related Alarms
7-2
7.1
Communication Related Alarms
The table below shows the communication alarms that may occur in MECHATROLINK-III com-
munications.
If an error is found in the command or data that a SERVOPACK receives, the SERVOPACK
returns the corresponding alarm code (in the COMM_ALM bit of the CMD_STAT field of the
response).
At the same time, the alarm code is displayed on the SERVOPACK.
Category
Alarm in Response
Remedy
SERVOPACK Side
COM-
M_ALM
Name
Meaning
Stop-
ping
Method
Alarm
Code
Alarm
Reset
Commu-
nication
Setting
Error
0
Communica-
tion data size
setting error
The received data size does
not match the data size set at
the local station.
The communication data
reception status after starting
communication is abnormal.
Review the number of
transmission bytes (S3).
Review the communica-
tion setting of the con-
troller.
Zero-
speed
stop-
ping
A.E41
Possi-
ble
0
Station
address set-
ting error
The station address setting is
invalid or a station assigned
the same station address
exists in the communication
network.
Review the station
addresses (S1, S2).
Zero-
speed
stop-
ping
A.E42
Impos-
sible
Commu-
nication
Establish-
ment
Error
B
Transmis-
sion cycle
setting error
An unsupported transmission
cycle was set on reception of
a CONNECT command.
Review the transmission
cycle setting of the con-
troller.
Zero-
speed
stop-
ping
A.E40
Possi-
ble
C
Synchroniza-
tion failure
On reception of the CONNECT
command and then the SYN-
C_SET command, the WDT
data is not refreshed in each
communication cycle and the
communication timing cannot
be synchronized.
Review the WDT pro-
cessing of the controller.
Check communication
connections.
Take countermeasures
against noise.
Zero-
speed
stop-
ping
A.E51
Possi-
ble
Continued on next page.
