SMC Networks LECSB Series, Руководство по эксплуатации

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13 - 6
13. COMMUNICATION FUNCTION
13.3 Protocol
13.3.1 Transmission data configuration
Since up to 32 axes may be connected to the bus, add a station number to the command, data No., etc. to
determine the destination driver of data communication. Set the station number to each driver using the
parameter. Transmission data is valid for the driver of the specified station number.
When "*" is set as the station number added to the transmission data, the transmission data is made valid for
all drivers connected. However, when return data is required from the driver in response to the transmission
data, set "0" to the station number of the driver which must provide the return data.
(1) Transmission of data from the PC or PLC...etc to the servo
S
O
H
S
T
X E
T
X
S
T
X E
T
X
Data
No.
Data*
10 frames (data)
Station number
Erro
r
c
o
d
e
6 frames
Positive response: Error code A
Negative response: Error code other than A
Servo side
(Slave station)
Controller side
(Master station)
C
o
m
m
a
n
d
Station number
Check-
sum
Check-
sum
(2) Transmission of data request from the PC or PLC...etc to the servo
S
O
H
S
T
X E
T
X
S
T
X E
T
X
Controller side
(Master station)
Servo side
(Slave station)
10 frames
C
o
m
m
a
n
d
Data
No.
Erro
r
c
o
d
e
Data*
6 frames (data)
Station number
Station number
Check-
sum
Check-
sum
(3) Recovery of communication status by time-out
E
O
T
Controller side
(Master station)
Servo side
(Slave station)
EOT causes the servo to return to
the receive neutral status.
(4) Data frames
The data length depends on the command.
or
Data
4 frames
Data
8 frames
or 12 frames or 16 frames
PC or PLC...etc
PC or PLC...etc
PC or PLC...etc