Group Function - Mitsubishi Electric Q Series Reference Manual

7 APPLICATION FUNCTIONS

7.4.3 Group function

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The group function is used to group the target stations of a transient transmission and
send data to all of the stations in a group with a single instruction. One network may
have a maximum of 32 groups.
By setting a group designation to the target station number in the control data of a
dedicated link instruction, stations with the matching group number retrieve the
transient data.
However, whether or not the transient transmission is normally completed cannot be
verified because the data is transmitted to multiple stations.
(1) Visual representation of the function
The following figure shows an example of grouping. When a transient
transmission is executed by designating group number 1, all of the three stations,
1N 3, 1N 5 and 1N
S S
1M 1
P
1N 6
S
Group No. 1
(2) Setting method
Set the group number of the target network module using the following network
parameters from GX Developer.
Item
Parameter screen Group No.
Control data target station No.
(3) Transient transmission instructions that allows group designation
No. Instruction
1 SEND
2 (S)WRITE
3 REQ
4 ZNWR
5 RRUN
6 RSTOP
7 RTMWR
8 Clock setting
9 Remote RUN/STOP
POINT
The execution of the transient transmission using the group function cannot be
verified.
When this mode of transient transmission is executed successively, a "No free area
in the receive buffer" (error code: F222) may occur. Design the system thoroughly
to allow for a sufficient interval between executions, and make sure to test (debug)
to confirm that successive executions can be performed without generating any
error.
6, retrieve the transient data.
S
Group No. 1
1N 2 1N
S
1N 5 1N
S
Group No. 1
Setting
Description
Data sending
Writes to word device of other station
Requests transient transmission to other station
Writes to word device of other station
Remote RUN
Remote STOP
Writes other station clock data
GX Developer
GX Developer
3
S
4
S
Set the desired group number.
Valid setting range
1 to 32 0 (no group designation)
81 (1) to A0 (32)
H H
GX Developer Operating Manual
MELSEC-Q
Default
Reference
Section 7.4.5 (1)
Section 7.4.5 (2)
Section 7.4.5 (3)
Section 7.4.5 (4)
Section 7.4.5 (5)
Section 7.4.5 (5)
Section 7.4.5 (6)
Section 7.4.7
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