Special Auxiliary Relays And Special Data Registers; General Description - Mitsubishi FX2N-10GM Hardware / Programming Manual

FX Series Positioning Controllers
6.

Special auxiliary relays and Special data registers

This section explain the special auxiliary relays and the special data registers of the positioning
unit.
6.1

General description

The auxiliary relays from M9000 and the data registers from D9000 onwards are assigned as
special devices. Various command inputs, status information and parameter set values can be
read and written in accordance with control.
Special auxiliary relays (M9000 or more)
The special auxiliary relays (special Ms) are mainly used for command inputs by writing and as
status information by reading.
• Command inputs (writing (reading))
Operation commands can be given by turning ON the special Ms such as start/stop and
FWD/RVS/ZRN, and can be controlled by programs without using external input terminals.
Some special Ms are turned ON when a command is entered from an external input termi-
nal, so can also be used for reading.
• Status information (reading)
These special Ms are read and used to indicate the status of the positioning unit.
Special data registers (D9000 or more)
The information of the present position and the program No./step No. being executed and vari-
ous parameter settings are saved in special data registers, and can be read and written by pro-
grams.
• The special Ms and the special Ds are also assigned to the buffer memories (BFM), and
those in the FX
controller using the programmable controller program (FROM/TO instruction). (Refer to
Section 7.)
-10GM or the FX
2N 2N
Special auxiliary relays and Special data registers 6
-20GM can be read and written from a programmable
6-1