Instruction manual
13.
COMMUNICATION FUNCTIONS
13.7 Time-out Operation
The master station transmits EOT when the slave station does not
start
reply operation (STX is not
received) 300[ms]
after
the master station has ended communication operation. 100[ms] after that, the
master station retransmits the message. Time-out occurs
if
the slave station does not answer after the
master station has performed the above operation three times. (Communication error)
1
OOms
1
OOms
300ms
-
300ms
-
1
OOms
300ms
-
-
300ms
'Time-out
W
m
m
m
m
Controller
(Master station)
8
m
a
E
m
E
m
E
T
2
T
I
T
I
a
0
a
0
m
0
I
I
I
*
Servo
(Slave station)
13.8
Retry
Operation
When
a
fault occurs
in
communication between the master
and
slave stations, the error code
in
the
response data from the slave station
is
a negative response code
([B]
to
F],
b]
to
[fJ).
In
this
case, the
master station retransmits the message whch was sent at the occurrence of the fault (Retry operation).
A
communication error occurs
if
the above operation
is
repeated and results in the error three or more
consecutive times.
m
yl
u)
yl
m
cn
m
m
W
'Communication error
Controller
(Master station)
f
I
2
8
T
z
5
5
(Slave statlon)
T:
m
m
m
XB
.B
x
B
x
T:
T:
Servo
sz
s;
sz
Similarly, when the master station detects a fault (e.g. checksum, parity)
in
the response data from the
slave station, the master station retransmits the message whch was sent at the occurrence of the fault.
A
communication error occurs
If
the retry operation
is
performed three times.
13- 8