Omron CQM1H - PROGRAM User Manual

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Communications Instructions Section 5-30
TXD(48) operates differently in host link mode and no-protocol mode, so
these modes are described separately.
Note Refer to 1-6 Communications Functions for more details on using the TXD(48)
instruction, setting communications protocol in the PC Setup, etc.
Host Link Mode N must be BCD from #0000 to #0061 (i.e., up to 122 bytes of ASCII). The
value of the control word (C) determines the port from which data will be out-
put, as shown below.
The specified number of bytes will be read from S through S+(N/2)–1, con-
verted to ASCII, and transmitted through the specified port. The bytes of
source data shown below will be transmitted in this order: 12345678...
The following table lists the Transmission Enabled Flags for each port. The
corresponding Transmission Enabled Flag will be ON when the CQM1H is
capable of transmitting data through that port.
The following diagram shows the format for host link command (TXD) sent
from the CQM1H. The CQM1H automatically attaches the prefixes and suf-
fixes, such as the node number, header, and FCS.
No-protocol Mode N must be BCD from #0000 to #00256. The value of the control word deter-
mines the port from which data will be output and the order in which data will
be written to memory.
Port Transmission Enabled Flag
CPU Unit’s built-in RS-232C port AR 0805
Peripheral port AR 0813
Serial Communications Board Port 1 IR 20105
Port 2 IR 20113
Not used. (Set to 0.)
Not used. (Set to 0.)
Serial port specifier (when bits 12 to 15 are 0.)
0: CPU Unit's built-in RS-232C port
1: Serial Communications Board port 1
2: Serial Communications Board port 2
Port 0: Port other than the peripheral port
1: Peripheral port
Digit number: 3 2 1 0
00
MSB LSB
S12
S+1 3 4
S+2 5 6
S+3 7 8
@ X X X X X X
.........
X X X * CR
Header
code
Data (122 ASCII characters max.) FCSNode
number
Terminator

Omron CQM1H - PROGRAM Specifications

General

Brand	Omron
Model	CQM1H - PROGRAM
Category	Controller
Language	English