Mitsubishi FR-E520-0.1KN Instruction Manual page 131

<Computer programming>
( 1 ) Communication protocol
Data communication between the computer and inverter is performed using the
following procedure:
Computer
↓ (Data flow)
Inverter
Inverter
↓ (Data flow)
Computer
*1. If a data error is detected and a retry must be made, execute retry operation with
the user program. The inverter comes to an alarm stop if the number of consecutive
retries exceeds the parameter setting.
*2. On receipt of a data error occurrence, the inverter returns "reply data 3" to the
computer again. The inverter comes to an alarm stop if the number of consecutive
data errors reaches or exceeds the parameter setting.
( 2 ) Communication operation presence/absence and data format types
Communication operation presence/absence and data format types are as follows:
No. Operation
Communication request is sent to
1) the inverter in accordance with the
user program in the computer.
2) Inverter data processing time
Reply data from
the inverter
(Data 1)) is
3)
checked for
error.
4) Computer processing delay time
Answer from
computer in
5) response to reply
data 3). (Data 3) is
checked for error)
Note: Data format is A" or E" when you set any of "0.01 to 9998" in Pr. 37 "speed
display" and "1" in data code "FF
1)
*
1
Run
Command
A'
Present
No error
Request C
accepted
With error
D
request rejected
Absent
No error
No Absent
processing
With error 3) Absent
Data read
*
2
4)
2) 3)
Data write
Running Parameter
Frequency Write
A A
(A")Note (A")Note
Present Present
C C
D D
Absent Absent
Absent Absent
Absent Absent
".
H
116
PARAMETERS
5)
Time
Inverter Monitor- Parame-
Reset ing ter Read
A B
Absent Present Present
E, E'
(E )
Absent "
Note
Absent F
Absent Absent
Absent G
Absent H
B
E
F
Absent
G
H