Initialization; Communication Procedure Example - Mitsubishi Electric MR-J2S-A Instruction Manual

14. COMMUNICATION FUNCTIONS

14.9 Initialization

After the slave station is switched on, it cannot reply to communication until the internal initialization
processing terminates. Hence, at power-on, ordinary communication should be started after.
(1) 1s or more time has elapsed after the slave station is switched on; and
(2) Making sure that normal communication can be made by reading the parameter or other data which
does not pose any safety problems.

14.10 Communication procedure example

The following example reads the set value of parameter No.2 "function selection 1" from the servo
amplifier of station 0.
Data item Value
Station number 0
Command 05
Data No. 02
Checksum calculation and
addition
Addition of SOH to make
up transmission data
Data transmission
Is there receive data?
Yes
Other than error code
No
3 consecutive times?
Yes
Receive data analysis
Error processing
Description
Servo amplifier station 0
Read command
Parameter No.2
Axis No. Command
Start
Data
Data make-up
Checksum 30H 30H 35H 02H 30H 32H 03H FCH
Transmission data
Data receive
No
Yes
300ms elapsed?
Yes
3 consecutive times?
Yes
100ms after EOT transmission
[A] [a]?
No
Error processing
End
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Data No.
[0] 0 5 STX 0 2 ETX
[0][0][5] [0][2]
STX ETX
SOH 0 0 5 STX
Master station
Master station
No
No
Master station
0 2 ETX F C 46H 43H
slave station
slave station
slave station