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Data Exchange between Modules Section 5-2
5-2 Data Exchange between Modules
The three methods for data exchange between Coordinator and Motion Con-
trol Modules are outlined in the following table. These methods can be used
simultaneously.
Method Outline Description
1. Cyclic refresh Exchanges data each
Coordinator Module cycle.
A Cyclic Refresh Area is allocated for each Motion Control
Module in the Coordinator Module.
2. Synchronous
data refresh
Broadcasts data at a spec-
ified sync cycle.
Specified synchronous data is broadcast from each Motion
Control Module and the Coordinator Module. All other
Modules receive and share the data in the Synchronous
Data Link Bit Area.
3. DM data
transfer
Transfers large volumes of
data between a specified
Motion Control Module and
the Coordinator Module
when required.
Data is transferred in the specified direction between the
specified DM Area words of a specified Motion Control
Module and the specified DM Area words of the Coordina-
tor Module when the DM Write Request Bit (A530.00) or
DM Read Request Bit (A530.01) in the Auxiliary Area of
the Coordinator Module is turned ON.
Coordinator
Module
Motion Control
Module #1
Motion Control
Module #4
Motion Control
Module #3
Motion Control
Module #2
Cyclic
Refresh
Area
Cyclic
Refresh
Area
Cyclic
Refresh
Area
Cyclic
Refresh
Area
Cyclic
Refresh
Area
1. Cyclic refresh
Sync Data
Link Bit
Area
Sync Data
Link Bit
Area
Sync Data
Link Bit
Area
Sync Data
Link Bit
Area
Sync Data
Link Bit
Area
2. Synchronous data refresh
Specified
DM Area
words
Specified
DM Area
words
3. DM data transfer