E-12
FX Series PLC User's Manual - Data Communication Edition
Inverter Communication
2 Specifications
2.4 Execution Times in Inverter Communication Instructions
2.4.2
Calculation method
Calculate the required time "T
inv
" for inverter communication instruction in units of "ms" as follows.
"INT(n)" in the calculation formula indicates an integer obtained by truncating decimal places of "n".
1. Length of 1 character
In inverter communication, the communication setting is as shown in following table.
The length of 1 character is as shown in the following calculation expression.
Length of 1 character = Start bit + Data Parity bit + Stop bit
= 10[bit]
2. Execution times in inverter communication instructions
Execution times in inverter communication instructions is as shown in the following calculation expression.
Name
Set value
bit
Start bit
-
1
Data length
7
7
Parity bit
Even number
1
Stop bit
1
1
Total
10
Communication
time
Calculation method
T
4
T
5
= 1[ms]
T
6
[n]
• For Scan time < T
7
[n]+T
8
[n]+T
9
[n]
• For Scan time
T
7
[n]+T
8
[n]+T
9
[n]
T
7
[n]+T
9
[n]
T
8
[n]
= Data check time in inverters
*4
T
3
= 1[ms]
Calculate "T
4
", "T
5
" and "T
6
[n]" as shown in the following table.
T
1
= 1[ms]
T
2
= {n
(T
4
+T
5
)}+
T
6
[n][ms]
T
inv
= T
1
+ T
2
+ T
3
T
6
[1]+T
6
[2]+T
6
[3]+
Sending and
receiving
frequency
= ( INT ( ) + 1)
Scan time
Scan time
15
= ( INT ( ) + 1)
Scan time
Scan time
T
7
[n]+T
8
[n]+T
9
[n]
= ( INT ( ) + 2)
Scan time
Scan time
T
7
[n]+T
8
[n]+T
9
[n]
= { ( )
(
) }
1000
Communication speed [bps]
1
Number of sending and
receiving characters
*1
Length of
1 character
Summary of Contents for FX-485ADP
Page 2: ......
Page 120: ...B 2 FX Series PLC User s Manual Data Communication Edition N N Network ...
Page 188: ...C 2 FX Series PLC User s Manual Data Communication Edition Parallel Link ...
Page 244: ...D 2 FX Series PLC User s Manual Data Communication Edition Computer Link ...
Page 344: ...E 2 FX Series PLC User s Manual Data Communication Edition Inverter Communication ...
Page 700: ...H 2 FX Series PLC User s Manual Data Communication Edition Programming Communication ...
Page 752: ...I 2 FX Series PLC User s Manual Data Communication Edition Remote Maintenance ...
Page 817: ......
