Omron HOME SECURITY SYSTEM - MOTION SENSOR FQM1-MMA21 - Manual (Page 33)

10
Expanded System Configuration Section 1-5
Host Link System The Host Link System allows the I/O memory of the Modules to be read/writ-
ten and the operating mode to be changed from a host computer (personal
computer or Programmable Terminal (PT)) by executing Host Link commands
or FINS commands that are preceded by a Host Link header and followed by
a terminator. A Host Link System is possible for either the peripheral port or
the RS-232C port on the Coordinator Module.
No-protocol (Custom)
Communications
System via RS-232C
Port No-protocol communications allow simple data transmissions, such as input-
ting bar code data and outputting printer data using communications port I/O
instructions TXD(236) and RXD(235). The start and end codes can be set
and, RS and CS signal control is also possible with no-protocol communica-
tions.
NT Link System
(1:N Mode, Standard) If the FQM1 and a Programmable Terminal (PT) are connected together using
the RS-232C port, the allocations for the PT’s status control area, status notify
area, objects such as touch switches, indicators, and memory maps can be
allocated in the I/O memory of the FQM1.
The NT Link System allows the PT to be controlled by the FQM1, and the PT
can periodically read data from the status control area of the FQM1, and per-
form necessary operations if there are any changes in the area. The PT can
communicate with the FQM1 by writing data to the status notify area of the
FQM1 from the PT. The NT Link System allows the PT status to be controlled
and monitored without using FQM1 ladder programming. The ratio of FQM1
Controllers to PTs is 1: n (n
≥ 1).
RS-232C
Host link commands
or FINS commands
embedded in Host Link
commands
Coordinator Module
Note: Turn ON pin 2 on the DIP switch on the front of the
Coordinator Module and set the serial communications
mode in the System Setup to "Host Link."
Host computer
Applicable Ports
Peripheral port
Yes
(See note.)
RS-232C port
Yes
Applicable Ports
RS-232C
RXD(235) instruction
TXD(236) instruction
Coordinator Module
Peripheral
No
RS-422A
Yes
Coordinator Module
RS-232C
Yes
Note Set the serial communications
mode in the System Setup to
"non-procedural."