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Mitsubishi MELSEC Q Series Reference Manual page 120

With melsec communication protocol
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1 The online change (write during RUN) status can be set to the programmable controller CPU in the
following screen of the programming tool.
• In case of the C24:
"Switch setting for I/O and intelligent functional module" screen
• In case of the E71:
"Ethernet operation setting" screen
2 For programmable controller CPUs other than the AnA/AnU/QnA/L/QCPU, device X (input) has two
processing points per point. When the designated device includes X, the following condition should
be met:
((points designated for X  2) + points of other designated devices)  the number of points that can
be processed in one communication
When only X is specified, the number of points that can be processed in one communication is 1/2 of
the values shown in the table.
3 These commands can be issued by the external device to connected the C24 (including a multidrop
connection station) as well as to a Q/L/QnACPU station on which the C24 is installed.
The commands cannot be issued to programmable controller CPUs of other stations by passing
them through the network system.
4 When there is a system protection on a Q/L/QnACPU to which one of these commands is issued,
an error occurs and an abnormal response is returned.
5 When a data read/write keyword (password) is registered for a Q/L/QnACPU to which a command
is issued, that same keyword should be specified in the command message. If the keywords do not
match, an error occurs and an abnormal response is returned.
6 When a data read/write keyword (password) is registered for a Q/L/QnACPU when a command is
issued on its program files and parameter files, that keyword should be specified in the command
message.
If the keywords do not match, an error occurs and an abnormal response is returned.
7 "Access station-1" indicates the access which one of the following stations.
1)
A station where the C24/E71 is loaded (local station)
2)
A Q/LCPU station connected on a Q/L series supporting network system (CC-Link IE
Controller Network, MELSECNET/H, MELSECNET/10, Ethernet) (other station), an
intelligent device station on CC-Link IE Field Network, or a MELSECNET/H remote I/O
station
3)
A Q/LCPU station linked with the C24 of 1) and 2) above using multidrop connection
8 "Access station-2" indicates the access which one of the following stations.
1)
A Q/QnACPU station connected on a QnA series supporting network system
(MELSECNET/10, Ethernet) (other station), or a MELSECNET/10 remote I/O station
2)
A Q/QnACPU station linked with the C24 of 1) above using multidrop connection
3)
A Q/QnACPU station connected via the QnACPU and network system (MELSECNET/H,
MELSECNET/10, Ethernet) (other station), or a MELSECNET/H or MELSECNET/10
remote I/O station
9 "Access station-3" indicates the access which stations other than 7 and 8 above.
(Example)
Programmable controller CPUs other than Q/L/QnACPU stations (other stations)
10 For details on the QnACPU to which multi-block batch read/write can be performed, refer to Section
3.3.10.
11 There are restrictions on the versions of the C24/E71 that can access the following devices. Refer to
the User's Manual (Basic).
• Link direct devices addressed LW10000 and greater
• Extended data register addressed D65536 and greater, and extended link register addressed
W10000 and greater
3 - 60
3 WHEN COMMUNICATING USING THE QnA COMPATIBLE 3E/3C/4C FRAMES OR 4E FRAME
3 - 60

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