Initialization; Communication Procedure Example - Mitsubishi Electric MELSERVO-J2 Series Instruction Manual

8. COMMUNICATION FUNCTIONS

8.9 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.

8.10 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
Station number
Command
Data No.
No
3 consecutive times?
Error processing
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Value Description
0 Servo amplifier station 0
05 Read command
02 Parameter No.2
Start
Data make-up
Checksum calculation and
addition
Addition of SOH to make
up transmission data
Data transmission
Data receive
Is there receive data?
Yes
300ms elapsed?
3 consecutive times?
Yes
Other than error code
[A] [a]?
No
Yes
Receive data analysis
End
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Axis No. Command
Data [0] 0 5 STX 0 2
[0][0][5] [0][2]
STX
Checksum 30H 30H 35H 02H 30H 32H 03H FCH
Transmission data SOH
No
No
Yes
No
Yes
100ms after EOT transmission
Error processing
8 - 9
Data No.
ETX
ETX
0 0 5 STX 0 2 ETX F C
Master station slave station
Master station slave station
Master station slave station
46H 43H