Omron FQM1-MMA21 Manuel D’Utilisation

105

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

1. Cyclic refresh

Sync Data
Link Bit
Area

2. Synchronous data refresh

Specified
DM Area
words

3. DM data transfer