Mitsubishi Electric FR-A820-00046 Instruction Manual page 793

Parameters
If a data error is detected and a retry must be made, perform retry operation with the user program.
The inverter trips if the number of consecutive retries exceeds the parameter setting.
On receipt of a data error occurrence, the inverter returns reply data (») to the computer again.
The inverter trips if the number of consecutive data errors reaches or exceeds the parameter
setting.
Communication operation presence/absence and data format types
● Data communication between the computer and inverter is made in ASCII code (hexadecimal
code).
● Communication operation presence/absence and data format types are as follows.
Operation
Communication request is sent to the
³
inverter in accordance with the user
program in the computer.
· Inverter data processing time
Reply data from
the inverter (Data
»
(³) is checked for
an error)
¿ Computer processing delay time
Answer from
computer in
response to reply
´
data »
(Data » is checked
for error)
Tab. 5-269: Communication and data format
In the communication request data from the computer to the inverter, 10 ms or more is also
required after "no data error (ACK)". (Refer to page 5-618.)
Reply from the inverter to the inverter reset request can be selected. (Refer to page 5-623.)
At mode error, and data range error, C1 data contains an error code. (Refer to page 5-629.)
Except for those errors, the error is returned with data format D.
FR-A800
A, A1
With
No error
C
(Request accepted)
With error
D
(Request rejected)
No error
Without
(No inverter
processing)
With error
Without
(Inverter outputs
» again.)
(N) Operation via communication and its settings
A A2 A
With With With
C C
C1
D D D
10 ms or more
Without
Without Without
(C)
Without F Without
A B B
Without With With
E, E1, E2,
E
C
E3
D D
D
Without Without
Without
(C) (C)
Without F F
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