D-55
FX Series PLC User's Manual - Data Communication Edition
Computer Link
6 Control Procedures and Setting Methods
6.5 Transfer Sequence Time Chart and Communication Time
A
Comm
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6.5.3
Transfer time in transfer sequence
This subsection explains how to calculate the approximate time after the computer starts data transfer and
the PLC gives a response until all communication is completed.
For the contents of T0 to T5, refer to the previous page.
1. When the computer reads data from the PLC
Communication time = T0 + (T1 + Longer time between T2 and TW) + T3 + T4 + T5
T1: Maximum one scan time (Because data is read from the PLC during the END processing while the
PLC is in RUN mode, reading requires up to one scan time depending on the sending timing.
Reading requires about 1 ms while the PLC is in STOP mode.)
T2: END processing time in the PLC executing data transfer
T4: Scan time or longer (In the case of wiring in the 1-to-N configuration, T4 should be longer than the
time-out time setting (D8129) extended by one scan time.)
TW: Message waiting time
2. When the computer writes data to the PLC
Communication time = T0 + (T1 + Longer time between T2 and TW) + T3
T1: Maximum one scan time (Because data is written to the PLC during the END processing while the
PLC is in RUN mode, writing requires up to one scan time depending on the sending timing. Writing
requires about 1 ms while the PLC is in STOP mode.)
T2: END processing time in the PLC executing data transfer
TW: Message waiting time
T0, T3, T5 =
Number of bits in one character (1 + 7 (8) + 0 (1) + 1 (2))
Number of characters
1
Baud rate
Start
bit
Data length
(7 or 8)
Parity bit
(0 or 1)
Stop bit
(1 or 2)
T0, T3 =
Number of bits in one character (1 + 7 (8) + 0 (1) + 1 (2))
Number of characters
1
Baud rate
Start
bit
Data length
(7 or 8)
Parity bit
(0 or 1)
Stop bit
(1 or 2)
Summary of Contents for FX-485ADP
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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 ...
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