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Data Memory (DM) Allocation Section 7-4
7-4 Data Memory (DM) Allocation
The following diagram shows the usage of the Unit’s allocated DM words.
7-4-1 Shared Area
The shared area is used to set and monitor values shared by all of the Units
(components).
Structure of the Control
Data Area
The control data area contains 103 words that are used to control operation of
the Simple Communications Unit and monitor the Unit’s operating status.
Ensure that there are 103 words available for the Control Data Area
regardless of the number of connected Units. The starting DM address is
set with Operation Switch SW2. Refer to Operation Switch (SW2) on
page 231 for details.
Shared area
Control data area
Individual Unit areas
Read variable
type area
Read data area
Write variable
type area
Write data area
Read data area
Write data area
CompoWay/F
SYSWAY
(103 words)
(27 words max.)
(26 words max.)
(27 words max.)
(26 words max.)
(Temperature Controller: 11 words
Digital Panel Meter: 18 words)
(Temperature Controller: 9 words
Digital Panel Meter: 10 words)
Offset Function
+0 Simple Communications Unit control
+1
Simple Communications Unit status*
1
+2
Syntax error DM address*
1
+3 Communications control for Units 0 to 7
+4 Communications control for Units 8 to 15