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MELSEC-Q
4 FUNCTIONS
(2) Service FREEZE, UNFREEZE
(Group 8)
Slave 1
(Group 3)
Slave 2
(Group 3)
Slave 3
(Group 3)
Slave n
Master
(FREEZE transmission to group 3)
Input data
FREEZE
Input image memory: The data is always refreshed by polling.
<during FREEZE cancel/default>The actual input is input to the input memory unchanged
(normal condition)
<during FREEZE execute>The actual input is input once into the input image memory at the FREEZE
service timing.
Service FREEZE (issued within the same group)
(3) Group selection
The number of groups is from 1 to 8 if with a total of 8 groups.
The slave can exist in arbitrary group of the 8 groups. They can also exist in
multiple groups. (The configurator specifies in which group which slaves exist.)
Multiple groups can be arbitrarily selected from the sequence program and
global control executed.
When selecting group 0 and transmitting the service is transmitted to all slave
stations.
Master
(transmitted to
groups 1 and 2)
PROFIBUS-DP network
Slave
Group 1
Group 5
Group 2
Group 8
