Protocol - Mitsubishi Electric MR-J2S-CP Instruction Manual

15. COMMUNICATION FUNCTIONS

15.3 Protocol

Since up to 32 axes may be connected to the bus, add a station number or group to the command, data
No., etc. to determine the destination servo amplifier of data communication. Set the station number to
each servo amplifier using the parameter and set the group to each station using the communication
command. Transmission data is valid for the servo amplifier of the specified station number or group.
When " * " is set as the station number added to the transmission data, the transmission data is made
valid for all servo amplifiers connected. However, when return data is required from the servo amplifier
in response to the transmission data, set "0" to the station number of the servo amplifier which must
provide the return data.
(1) Transmission of data from the controller to the servo
S
Controller side
O
(Master station)
H
Servo side
(Slave station)
(2) Transmission of data request from the controller to the servo
S
Controller side O
(Master station)
H
Servo side
(Slave station)
POINT
Whether station number setting will be made or not must be selected if
the RS-232C communication function is used. Note that choosing "no
station numbers" in parameter No. 57 will make the communication
protocol free of station numbers.
S
Data
T Data*
No.
X
Station number
or
group
10 frames
S E
Data Check
T T
No. sum
X X
Station number
or
group
10 frames (data)
E
Check
T
sum
X
S
T
X
6 frames
Positive response: Error code
Negative response: Error code
S
T
X
15 - 5
Station number
or
group
E
Check
T
sum
X
A
other than A
Station number
or
group
E
Data* T
X
6 frames (data)
Check
sum