Communication With Programmable Controller; Outline - Mitsubishi FX2N-10GM Hardware / Programming Manual

FX Series Positioning Controllers
7.

Communication with Programmable Controller

When the FX
grammable controller, positioning data such as the travel, the operation speed, etc., can be set
and the present position can be monitored. This section explains the communication with the
programmable controller to perform these operations.
7.1

Outline

Communication with the programmable controller is performed using the FROM/TO instruction
of the programmable controller via buffer memories (BFM) inside the positioning unit.
The schematic diagram below shows the communication between the programmable controller
and the positioning unit. (For system configuration, refer to Section 1.)
FROM instruction: Reads the contents of the BFM to the programmable controller.
TO instruction:
• Between the programmable controller and the buffer memories in the positioning unit, com-
munication is performed when the FROM or TO instruction in the sequence program is exe-
cuted. At this time, the positioning unit may be in the MANU or AUTO mode.
• The buffer memories interlock with the special M's and the special D's in the positioning
unit. When the contents of the buffer memories change, the contents of the special Ms and
the special D's also change. The positioning unit automatically performs communication
between them.
-10GM/FX -20GM positioning unit is connected to the FX
2N 2N
Writes the contents of the programmable controller to the BFM.
Communication with Programmable Controller 7
/FX Series pro-
2N 2NC
7-1