Mitsubishi Electric MELIPM Series Instruction Manual page 68

Approximately 12ms plus waiting time after the drive unit has completed
receiving the data sent by the computer, the drive unit sends the drive unit
returning data to the computer.
Set the waiting time in Pr. 123 to match the answerable time of the computer.
The waiting time may also be set using the computer sending data.
MEMO
In this case, set 9999 in Pr. 123.
(4) Communication data structure
Communication
Mode
Data
Computer sending
data
Without
Write Drive unit
error
returning
With
data
error
Computer sending
data
Without
Drive unit
error
sending
With
data
Read
error
Without
Computer
error
replying
With
data
error
Number of Characters
1 2 3
Station Instruction
ENQ
number
Station CR
ACK
number LF
Station Error
NAK
number code
Station Instruction
ENQ
number
Station
STX Data code EXT Sumcheck
number
Station Error
NAX
number code
Station CR
ACK
number LF
Station CR
NAK
number LF
8-14
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8 PARAMETER FUNCTIONS
4 5 6 7
Data code Sumcheck
code
CR
LF
Sumcheck
code
CR
LF
8 9 10
CR
LF
CR
LF
CR
LF