801
Basic I/O Unit Instructions Section 3-22
Ladder Symbol
Variations
Applicable Program Areas
Operands N: Unit number
Specifies the CPU Bus Unit’s unit number (0000 to 000F hex or 0 to 15 deci-
mal).
Operand Specifications
Description DLNK(226) performs immediate I/O refreshing for the CPU Bus Unit with the
specified unit number. The data listed below is refreshed. Refer to the Precau-
tions below for details on the execution conditions to use for immediate
refreshing.
1. The words allocated to the CPU Bus Unit in the PLC’s CPU Bus Unit Areas
(25 words in the CIO Area and 100 words in the DM Area)
2. Data specific the CPU Bus Unit such as data link data or DeviceNet Re-
mote I/O Communications data (refreshed together with the data in the
CPU Bush Unit Areas)
DLNK(226)
N
N: Unit number
Variations Executed Each Cycle for ON Condition DLNK(226)
Executed Once for Upward Differentiation @DLNK(226)
Executed Once for Downward Differentiation Not supported
Immediate Refreshing Specification Not supported
Block program areas Step program areas Subroutines Interrupt tasks
OK OK OK OK
Area N
CIO Area CIO 0 to CIO 6143
Work Area W0 to W511
Holding Bit Area H0 to H511
Auxiliary Bit Area A448 to A959
Timer Area T0000 to T4095
Counter Area C0000 to C4095
DM Area D0 to D32767
Indirect DM addresses
in binary
@ D0 to @ D32767
Indirect DM addresses
in BCD
*D0 to *D32767
Constants #0000 to #000F (binary) or 0 to 15 (decimal)
Data Registers DR0 to DR15
Index Registers ---
Indirect addressing
using Index Registers
,IR0 to ,IR15
–2048 to +2047 ,IR0 to –2048 to +2047 ,IR15
DR0 to DR15, IR0 to IR15
,IR0+(++) to ,IR15+(++)
,–(– –)IR0 to, –(– –)IR15
CPU Bus Unit Data refreshing specific to the Unit
Controller Link Unit Data link refreshing
DeviceNet Unit Remote I/O communications refreshing
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