Mitsubishi Electric Q80BD-J61BT11N, Руководство пользователя

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App - 32 App - 32
MELSEC
APPENDIX
Appendix 3.2 Cyclic transmission processing time
This section shows the transmission processing time taken when data of remote input
(RX), remote output (RY) and remote register (RWw, RWr) are transferred by cyclic
transmission.
When calculating the transmission delay time, the following processing time must be
added to the cyclic transmission processing time shown in this section.

The execution cycle time of reading/writing

The own station access processing time by the md function (Refer to POINT.)
POINT
The own station access processing time by the md function differs according to the performance/
loaded condition of the personal computer and the type of the CC-Link Ver.2 board.
The following table shows the example of the processing time of the personal computer. Use it as a guide.
1024 bytes own station access processing time
Personal computer CPU
specification
Reading data from own station
(mdReceive)
Writing data to own station
(mdSend)
Q80BD-J61BT11N Q81BD-J61BT11 Q80BD-J61BT11N Q81BD-J61BT11
Pentium II (233MHz)
1.2ms — 0.5ms —
Pentium III (533MHz)
0.6ms — 0.2ms —
Pentium4 (3GHz)
0.3ms — 0.1ms —
PentiumD (2.8GHz)
0.35ms 0.65ms 0.1ms 0.1ms
Intel Core2Duo (1.86GHz)
0.3ms 0.6ms 0.1ms 0.1ms
[1] In the case of block data assurance per station is disabled
(1) Master station (CC-Link Ver.2 board) remote I/O station
(a) Master station (CC-Link Ver.2 board) (RX) Remote I/O
station (input)
The following formula indicates the time taken from the moment a signal is
input to the remote I/O station until RX of the master station (CC-Link Ver.2
board) turns on (off).
[Formula]
[Normal value]
LS 1 + Remote I/O station response time [ms] ( 1)
LS: Link scan time (refer to Appendix 3.1)
(Example) When the link scan time is 3 ms and the remote I/O station
response time is 1.5 ms:
LS 1 + Remote I/O station response time [ms]
= 3 1 + 1.5
= 4.5 [ms]
[Maximum value]
LS 2 + Remote I/O station response time [ms] ( 1)
LS: Link scan time (refer to Appendix 3.1)
(Example) When the link scan time is 3 ms and the remote I/O station
response time is 1.5 ms:
LS 2 + Remote I/O station response time [ms]
= 3 2 + 1.5
= 7.5 [ms]
1: When reading RX from the CC-Link Ver.2 board with the md function, it is
necessary to add the own station access processing time of the md function.