1022
Serial Communications Instructions Section 3-24
Ladder Symbol
Variations
Applicable Program Areas
Operands The contents of the control word, C, are as shown below.
Operand Specifications
STUP(237)
C
S
C: Control word (port)
S: First source word
Variations Executed Each Cycle for ON Condition STUP(237)
Executed Once for Upward Differentiation @STUP(237)
Executed Once for Downward Differentiation Not supported.
Immediate Refreshing Specification Not supported.
Block program
areas
Step program
areas
Subroutines Interrupt tasks
OK OK OK Not allowed
15 8 011 712
C
Unit address of port device
CPU Unit: 00 hex
CPU Bus Unit: Unit number + 10 hex
Inner Board: E1 hex (CS Series only)
Serial port number
1 hex: Peripheral port on CPU Unit or Port 1 on CPU Bus Unit or Inner Board
2 hex: Built-in RS-232C port on CPU Unit or Port 2 on CPU Bus Unit or Inner Boar
s set to 0.
Area C S
CIO Area CIO 0000 to CIO 6143 CIO 0000 to CIO 6134
Work Area W000 to W511 W000 to W502
Holding Bit Area H000 to H511 H000 to H502
Auxiliary Bit Area A000 to A438
A448 to A959
A000 to A438
A448 to A950
Timer Area T0000 to T4095 T0000 to T4086
Counter Area C0000 to C4095 C0000 to C4086
DM Area D00000 to D32767 D00000 to D32758
EM Area without bank E00000 to E32767 E00000 to E32758
EM Area with bank En_00000 to En_32767
(n = 0 to C)
En_00000 to En_32758
(n = 0 to C)
Indirect DM/EM
addresses in binary
@ D00000 to @ D32767
@ E00000 to @ E32767
@ En_00000 to @ En_32767
(n = 0 to C)
Indirect DM/EM
addresses in BCD
*D00000 to *D32767
*E00000 to *E32767
*En_00000 to *En_32767
(n = 0 to C)
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