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Cycle Time/High-speed Processing Section 6-1
• Words allocated to the Unit in the CIO Area
• Words allocated to the Unit in the DM Area
• Data specific to the Unit (See note.)
Note Data specific to a CPU Bus Unit would include data links for Control-
ler Link Unit or SYSMAC LINK Units, as well as remote I/O for De-
viceNet Units.
Application Example: With a long cycle time, the refresh interval for Controller
Link data links can be very long. This interval can be shortened by executing
DLNK(226) for the Controller Link Unit to increase the frequency of data link
refreshing.
Note The CS1G/H-CPU@@ (-V1) and CJ1@-CPU@@ CPU Units do not support
this function.
Note 1. Longer cycle times (e.g., 100 ms) will increase the interval between when
data links are refreshed. DLNK(226) can be used in this case, as shown in
the following example.
Note If DLNK(226) is executed for a CPU Bus Unit that is busy refreshing
data, data will not be refreshed and the Equals Flag will turn OFF.
Normally, the Equals Flag should be programmed as shown below to
DLNK
N
DLNK
#1
N: Unit number of CPU Bus Unit
The instruction on the left would refresh the words
allocated to the Unit in the CIO Area and DM Area, and
data specific to the CPU Bus Unit with unit number 1.
Example:
END
DLNK
M
DLNK
N
Data links (Controller Link or
SYSMAC Link) are refreshed here for
the CPU Bus Unit with unit number N.
(See note.)
I/O refresh
Peripheral
servicing
Cyclic task n
Data links (Controller Link or
SYSMAC Link) are refreshed here for
the CPU Bus Unit with unit number M.
(See note.)
Data links are all refreshed here for
Controller Link and SYSMAC Link.
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