Communication Related Alarms - YASKAWA S-7 Series Command Manual

7.1 Communication Related Alarms

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
COM-
M_ALM
0
Commu-
nication
Setting
Error
0
B
Commu-
nication
Establish-
ment
Error
C
7-2
Alarm in Response
Name Meaning
The received data size does
not match the data size set at
Communica-
the local station.
tion data size
The communication data
setting error
reception status after starting
communication is abnormal.
The station address setting is
Station invalid or a station assigned
address set- the same station address
ting error exists in the communication
network.
Transmis- An unsupported transmission
sion cycle cycle was set on reception of
setting error a CONNECT command.
On reception of the CONNECT
command and then the SYN-
C_SET command, the WDT
Synchroniza-
data is not refreshed in each
tion failure
communication cycle and the
communication timing cannot
be synchronized.
Remedy
Review the number of
transmission bytes (S3).
Review the communica-
tion setting of the con-
troller.
Review the station
addresses (S1, S2).
Review the transmission
cycle setting of the con-
troller.
Review the WDT pro-
cessing of the controller.
Check communication
connections.
Take countermeasures
against noise.
SERVOPACK Side
Stop-
Alarm Alarm
ping
Code Reset
Method
Zero-
speed Possi-
A.E41
stop- ble
ping
Zero-
speed Impos-
A.E42
stop- sible
ping
Zero-
speed Possi-
A.E40
stop- ble
ping
Zero-
speed Possi-
A.E51
stop- ble
ping
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