Instruction manual

125
4
PARAMETERS
(2) Communication operation presence/absence and data format types
Communication operation presence/absence and data format types are as follows:
* In the communication request data from the computer to the inverter, 10ms or more is
also required after "no data error (ACK)". (Refer to page 128.)
No. Operation
Run
Command
Running
Frequency
Parameter
Write
Inverter
Reset
Monitoring
Parameter
Read
1)
Communication request is
sent to the inverter in
accordance with the user
program in the computer.
A'
A
(A")
Note 1
A
(A")
Note 2
ABB
2)
Inverter data processing
time
Present Present Present Absent Present Present
3)
Reply data
from the
inverter
(Data 1) is
checked for
error.
No error*
(Request
accepted)
CCCAbsent
E,E'
(E")
Note 1
E
(E")
Note 2
With error
(request
rejected)
DDDAbsentF F
4)
Computer processing delay
time
Absent Absent Absent Absent Absent Absent
5)
Answer from
computer in
response to
reply data 3).
(Data 3) is
checked for
error)
No error*
(No inverter
processing)
Absent Absent Absent Absent G G
With error.
(Inverter
outputs 3)
again)
Absent Absent Absent Absent H H
Note: 1. Setting any of "0.01 to 9998" in Pr. 37 "speed display" and "1" in instruction
code "HFF" changes the data format to A" or E". The output frequency is the
value of the speed display and its unit is 0.001r/min. If the instruction code FF
is not 1, the unit is 1r/min and the 4-digit data format can be used.
2. The read/write data format of Pr. 37 "speed display" is always E"/A".
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