Instruction manual

PARAMETERS
111
<Computer programming>
(
1
)
Communication protocol
Data communication between the computer and inverter is performed using the following procedure:
*
1
*
2
Computer
Inverter
↓
(Data flow)
Computer
↓ (Data flow)
Inverter
Data read
Data write
Time
1)
2) 3)
4)
5)
*1. If a data error is detected and a retry must be made, execute retry operation from 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
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.
A’ A A A B B
2) Inverter data processing time Present Present Present Absent Present Present
No error
Request accepted
C C C Absent
E
E’
E
3)
Reply data from the
inverter
(Data 1) is checked
for error)
With error
request rejected
D D D Absent F F
4) Computer processing delay time Absent Absent Absent Absent G G
No error
No processing
Absent Absent Absent Absent G G
5)
Answer from
computer in response
to reply data 3)
(Data 3) is checked
for error)
With error data
3) is output
Absent Absent Absent Absent H H
(
3
)
Data format
Hexadecimal data is used. Data is automatically transferred in ASCII between the computer and inverter.
1) Data format types
(1) Communication request data from computer to inverter
*3
ENQ
*4
123456789101112
13
*3
ENQ
*4
1234567891011
*3
ENQ
*4
123456789
[Data format]
Format A
[Data read]
Format A'
Format B
Inverter
station
number
Instruction
code
*5
Waiting
time
Data
Sum
sheck
Inverter
station
number
Inverter
station
number
Instruction
code
Instruction
code
*5
Waiting
time
*5
Waiting
time
Data
Sum
sheck
Sum
sheck
←Number of characters
←
Number of characters
←
Number of characters
4