Omron CQM1H-SCB41 Operation Manual page 120

Using No-protocol Communications
RECEIVE – RXD( ) in Noprotocol Mode
Control Word: C
RXD( )
15 00
0 0
The specified number of bytes are read from the specified port as specified in
the control word and stored starting at D.
• Up to 256 bytes of data can be read each time the instruction is executed.
• The bytes of received data will be received in the following order.
Digit 0 = 0
MSB LSB
D 1
D+1 3
D+2 5
D+3 7
• If the value of N is larger than the number of receive bytes, only the num-
ber of bytes actually received will be read into memory.
• Communications parameters for the Serial Communications Board are
set in the PC Setup. Refer to the CQM1H Programming Manual for
details.
First destination word
D
Control word
C
Number of bytes
N
(4 digits BCD, 0000 to 0256)
Byte order 0: Most significant bytes first
1: Least significant bytes first
Not used. (Set to 0.)
Port 0: RS-232C port on CPU Unit
1: Port 1 on Serial Communications Board
2: Port 2 on Serial Communications Board
Not used. (Set to 0.)
2 D
4
D+1
6
D+2
8 D+3
Section 6-4
Digit 0 = 1
MSB LSB
2 1
4 3
6 5
8 7
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