Block Guarantee Of Cyclic Data Per Station - Mitsubishi Electric Q Series Reference Manual

6 PROGRAMMING

6.2.2 Block guarantee of cyclic data per station

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Since handshakes are performed between a CPU module and a network module for link
refresh, consistency of cyclic data is guaranteed for each station (link data separation
prevention per station
As shown below, set the send and receive parameters as needed.
These settings can be made using the common parameters (supplementary settings)
only for the control station.
The default varies depending on the network type.
Network type
MELSECNET/H mode
MELSECNET/10 mode
MELSECNET/H Extended mode
Network range assignments
By selecting both [Block send data assurance per station] and [Block receive data
assurance per station], an interlock for the link data between the stations to be set
becomes unnecessary.
CPU module device W
Updated portion
Refresh A
of refresh A
Updated portion
Refresh B
of refresh B
Updated portion
Refresh C
of refresh C
<Precautions>
(1) In order to enable the block guarantee per station, it is necessary to set the
refresh parameters. (Refer to Section 5.7.)
(2) It is not necessary to set the block guarantee of cyclic data per station for normal
stations.
POINT
(1) The block guarantee per station applies only to the refresh processing. To use
the direct access (J \
be interlocked.
(2) For the transmission delay time calculation for the case where the Block
send/receive data assurance per station is set enabled, refer to Section 3.3.2 (1)
(a) POINT.
(3) When the network is set up in the MELSECNET/10 mode, block guarantee per
station is valid only for stations with QCPU. For those with ACPU/QnACPU,
set interlock referring to interlock program example in Section 6.2.3.
1: The separation prevention refers to a prevention of link data with double
word precision (32 bits), such as the current value of the positioning module,
from being separated into new data and old data in one word (16 bits) units
due to the cyclic transmission timing.
1).
"No" for both send and receive
"Yes" for both send and receive
Supplementary settings
Network module LW
Station number 1
Station number 2
(Host)
Station number 3
Station number 4
designation) of the link devices, the programs should
Default
Data assured
Data assured
Data assured
Data assured
MELSEC-Q
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