IDEC FT1A Series User Manual

7: D EVICE A DDRESSES
7-2 S MART AXIS P RO /L ITE U SER ' S M ANUAL FT9Y-B1378
Special Internal Relays
Special internal relays M8000 through M8177 are used for controlling the CPU operation and communication, and for indicating the
CPU statuses. All special internal relays cannot be used as destinations of advanced instructions.
Internal relays M300 through M335 are used to read input device statuses of the IOREF (I/O refresh) instruction.
Note: Do not change the status of reserved special internal relays, otherwise the SmartAXIS may not operate correctly.
Special Internal Relay Device Addresses
Device
Address
Description
CPU
Stopped
Power
OFF
Read/
Write
Ladder FBD
M8000 Start Control Maintained Maintained Write X X
M8001 1-sec Clock Reset Cleared Cleared Write X X
M8002 All Outputs OFF Cleared Cleared Write X X
M8003 Carry (Cy) or Borrow (Bw) Cleared Cleared Read X 
M8004 User Program Execution Error Cleared Cleared Read X X
M8005 Remote I/O Slave 1 Communication Error Operating Cleared Read X X
M8006 Remote I/O Slave 2 Communication Error Operating Cleared Read X X
M8007 Remote I/O Slave 3 Communication Error Operating Cleared Read X X
M8010 In daylight saving time period (system version 1.10 or later) Operating Cleared Read X X
M8011-
M8012
— Reserved —  
M8013 Calendar/Clock Data Write/Adjust Error Flag Operating Cleared Read X X
M8014 Calendar/Clock Data Read Error Flag Operating Cleared Read X X
M8015 — Reserved —  
M8016 Calendar Data Write Flag Operating Cleared Write X X
M8017 Clock Data Write Flag Operating Cleared Write X X
M8020 Calendar/Clock Data Write Flag Operating Cleared Write X X
M8021 Clock Data Adjust Flag Operating Cleared Write X X
M8022 User Communication Receive Instruction Cancel Flag (Port 2) Cleared Cleared Write X 
M8023 User Communication Receive Instruction Cancel Flag (Port 3) Cleared Cleared Write X 
M8024 BMOV/WSFT Executing Flag Maintained Maintained Read X 
M8025 Maintain Outputs While CPU Stopped Maintained Cleared Read/Write X X
M8026 SD Memory Card Status Maintained Cleared Read X X
M8027 SD Memory Card Writing Flag Maintained Cleared Read X X
M8030
High-speed Counter (Group 1/I0)
Comparison Output Reset Cleared Cleared Read/Write X X
*
M8031 Gate Input Maintained Cleared Read/Write X X
*
M8032 Reset Input Maintained Cleared Read/Write X X
*
M8033 Reset Status Maintained Cleared Read X X
M8034 Comparison ON Status Maintained Cleared Read X X
M8035 Overflow Maintained Cleared Read X X
M8036 Underflow Maintained Cleared Read X X
M8037 Count Direction Maintained Cleared Read X X
M8040
High-speed Counter (Group 2/I2)
Comparison Output Reset Cleared Cleared Read/Write X X
*
M8041 Gate Input Maintained Cleared Read/Write X X
*
M8042 Reset Input Maintained Cleared Read/Write X X
*
M8043 Comparison ON Status Maintained Cleared Read X X
M8044 Overflow Maintained Cleared Read X X
M8045
High-speed Counter (Group 3/I3)
Comparison Output Reset Cleared Cleared Read/Write X X
*
M8046 Gate Input Maintained Cleared Read/Write X X
*
M8047 Reset Input Maintained Cleared Read/Write X X
*
M8050 Reset Status Maintained Cleared Read X X
M8051 Comparison ON Status Maintained Cleared Read X X
M8052 Overflow Maintained Cleared Read X X
M8053 Underflow Maintained Cleared Read X X
M8054 Count Direction Maintained Cleared Read X X

IDEC FT1A Series Specifications

General

Brand	IDEC
Model	FT1A Series
Category	Controller
Language	English