5
1-1-2 Protocols
The Communications Board supports the following protocols.
Protocol
Device
Connection
configuration
Outline
Communications
instruction
Host Link
PC
←
→
Personal
computer or PT
1 to 1 or
1 to N
Communications procedure between a
host personal computer and PCs.
Can monitor operation status of PC or bit
status from a personal computer.
Can transfer data stored in the IOM area
of PC to a host personal computer using
the TXD instruction.
Host Link commands
or TXD instruction
Non-proce-
dure
PC
←
→
Personal
computer or Com-
ponent
1 to 1
Can achieve simple communications se-
quences using communications port I/O
instructions (TXD, RXD), including data
input from a bar code reader and data
output to a printer.
Can control RS, CS, ER, and DR control
signals using the instructions.
TXD and
RXD instructions
1 to 1 link
PC
←
→
PC
1 to 1
Connects two PCs on a one to one basis.
The PCs share LR Area data.
---
NT Link
PC
←
→
PT
1 to 1 or
1 to N
Achieves data communications by con-
necting PCs and PTs on a one to one ba-
sis or one to N basis.
---
Protocol
macros
PC
←
→
Various
components
1 to 1 or
1 to N
Can transmit messages by defining a spe-
cific communications sequences.
Can register up to 1,000 communications
sequences.
The Protocol Support Software is used to
create communications sequences (mac-
ros).
PMCR instruction
Note
Refer to the operation/system manuals for details on the Host Link procedure,
non-procedure communication, 1:1 links, and NT Links. This manual provides
details on only protocol macros.
Functions
Section 1-1
