Mitsubishi Electric FR-D720S SC EC Instruction Manual page 362

Communication operation and settings
● Response time
⇓ Data flow
⇓ Data flow
Fig. 6-112: Response time
Formula for data sending time:
sending time [s]
The communication specifications are listed in the table below:
Name
Stop bit length
Data length
Parity check
Tab. 6-55: Communication specifications
NOTES In addition to the above, 1 start bit is necessary.
Minimum number of total bits: 9 bits. Maximum number of total bits: 12 bits.
The data check time related to different functions is shown in the table below:
Function
Various monitors, run command, frequency setting
(RAM)
Parameter read/write, frequency setting (E²PROM)
Parameter clear/all clear
Reset command
Tab. 6-56: Data check time
6 - 212
Data sending time (Refer to the following formula)
Inverter data processing time =
Computer
Inverter
Inverter
Computer
Data
=
Communication speed
(Baudrate)
Yes
No
Waiting time
(setting × 10ms)
10ms or more necessary
Data sending time (Refer to the following formula)
Number of data
1
×
characters
(refer to page 6-207)
Number of Bits
1 bit
2 bits
7 bit
8 bits
1 bit
0 bits
Data Check Time
< 12ms
< 30ms
< 5s
— (no answer)
+ Data check time
(Depends on the
instruction code
(see Tab. 6-56))
Time
Communications specifications
×
(total number of bits)
Parameter
I001327E