SMC Networks LECSB2-T Series User Manual

14. COMMUNICATION FUNCTION
14 - 7
14.3 Protocol
14.3.1 Transmission data configuration
Since up to 32 axes may be connected to the bus, add a station No. to the command, data No., etc. to
determine the destination driver of data communication. Set the station No. to each driver using the
parameters. Transmission data is enabled for the driver of the specified station No.
When "*" is set as the station No. added to the transmission data, the transmission data is enabled for all
drivers connected. However, when return data is required from the driver in response to the transmission
data, set "0" to the station No. of the driver which must provide the return data.
(1) Transmission of data from the PC or PLC...etc to the servo
Data*
SOH
STX
Command
Data
No.
ETX
STX ETX
Checksum
Checksum
10 frames + (data)
6 frames
Positive response: Error code = A
Negative response: Error code = other than A
Station No.
Station No.
Controller side
(master station)
Servo side
(slave station)
Error code
(2) Transmission of data request from the PC or PLC...etc to the servo
Data*
SOH
STX
Command
Data
No.
ETX
STX ETX
Checksum
Checksum
Station No.
Station No.
Controller side
(master station)
Servo side
(slave station)
Error code
10 frames
6 frames + (Data)
(3) Recovery of communication status by time-out
EOT causes the servo to return to the receive neutral status.
EOT
Controller side
(master station)
Servo side
(slave station)
(4) Data frames
The data length depends on the command.
12 framesData
4 frames
Data
8 frames
or
or or 16 frames
PC or PLC...etc
PC or PLC...etc
PC or PLC...etc

SMC Networks LECSB2-T Series Specifications

General

Brand	SMC Networks
Model	LECSB2-T Series
Category	DC Drives
Language	English