Omron FQM1-CM001, FQM1-MMA21, FQM1-MMP21 Expanded System Configuration, Section, Host Link System

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.

Host computer

RS-232C

Host link commands or FINS commands embedded in Host Link commands

Applicable Ports

Coordinator Module

Peripheral port	RS-232C port
Yes	Yes
(See note.)

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."

No-protocol (Custom) Communications System via RS-232C Port

NT Link System

(1:N Mode, Standard)

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.

Coordinator Module

Applicable Ports

Coordinator Module

Peripheral	RS-232C	RS-422A
No	Yes	Yes

Note Set the serial communications mode in the System Setup to "non-procedural."

RXD(235) instruction

RS-232C

TXD(236) instruction

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).

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