Omron CS1G/H-CPUxxH Instructions Manual page 879

Serial Communications Instructions
Example: Performing
Signal Control
3-24-4 RECEIVE: RXD(235)
Purpose
Ladder Symbol
Variations
Applicable Program Areas
858
When CIO 000001 is ON in the following example, the RS signal and ER sig-
nal are set according to the respective statuses of bits 15 and 14 in D00300.
1
3
4
20
C: D00400
S: D00300
Reads the specified number of bytes of data from the specified port.
RXD(235)
D
C
N
Variations Executed Each Cycle for ON Condition
Executed Once for Upward Differentiation
Executed Once for Downward Differentiation Not supported.
Immediate Refreshing Specification
Block program Step program
areas
OK OK
3
Not used.
15 14 13 12
1 0 0 0
ER signal set to 0
RS signal set to 1
D: First destination word
C: Control word
N: Number of bytes to store
0000 to 0100 hex (0 to 256 decimal)
Subroutines
areas
OK
Section 3-24
0
Byte order
0: Disabled
RS and ER signal control
3: RS and ER signal control.
RXD(235)
@RXD(235)
Not supported.
Interrupt tasks
OK