IDEC MICROSmart FC6A Series User Manual page 331

Device
Address
M8384 User Communication Receive Instruction Cancel Flag (Port 25)
M8385 User Communication Receive Instruction Cancel Flag (Port 26)
M8386 User Communication Receive Instruction Cancel Flag (Port 27)
M8387 User Communication Receive Instruction Cancel Flag (Port 28)
M8390 User Communication Receive Instruction Cancel Flag (Port 29)
M8391 User Communication Receive Instruction Cancel Flag (Port 30)
M8392 User Communication Receive Instruction Cancel Flag (Port 31)
M8393 User Communication Receive Instruction Cancel Flag (Port 32)
M8394 User Communication Receive Instruction Cancel Flag (Port 33)
M8395 to
— Reserved —
M8447
M8450 BACnet Communication Bit
M8451 to
— Reserved —
M8597
M8600
M8601 High-speed Counter (Group 3/I3)
M8602
M8603 to
— Reserved —
M8997
Supplementary Descriptions of the Special Internal Relays
■ M8000: Start Control
M8000 controls the run/stop status of the FC6A Series MICROSmart. The CPU is set to run when M8000 is turned on, and the
CPU is set to off when M8000 is turned off. See "Start/Stop Operation" on page 4-15. However, the function switch, stop input,
and reset input have precedence over start control. M8000 maintains its status when the CPU is powered down. When data to
be maintained during a power failure disappears after the CPU has been off for a period longer than the battery backup
duration, the CPU restarts operation as selected in Configuration > Run/Stop Control > Run/Stop Selection at Keep Data Error.
For details, see "Run/Stop Selection at Keep Data Error" on page 5-9.
■ M8001: 1-s Clock Reset
While M8001 is on, M8121 (1-s clock) is always off.
■ M8002: All Outputs OFF
While M8002 is on, all outputs are off. The self-holding circuit created in the ladder program is also off.
■ M8003: Carry/Borrow
When a carry (Cy) or borrow (Bw) results from executing an addition or subtraction instruction, M8003 is turned on. For details,
see "Carry and Borrow" on page 8-10".
■ M8004: User Program Execution Error
When an error occurs while executing a user program, M8004 is turned on. For details on user program execution errors, see
"User Program Execution Error" on page 13-6.
■ M8005: Communication Error
When an error occurs during data link communication, M8005 is turned on. The state is retained even when the error is cleared.
■ M8006: Communication Prohibited Flag (When Data Link Master)
During data link communication, communication is stopped while M8006 is on.
■ M8007: Initialization Flag (When Data Link Master)/Stop Communication Flag (When Data Link Slave)
When data link master: When this flag is turned on in the run status, the data link is initialized just once to check the connection
When data link slave : This flag is turned on when communication from the master is interrupted for 10 s or longer. This flag is
■ M8010: Status LED Operation
While M8010 is on, the status LED [STAT] is turned on. While off, the status LED [STAT] is turned off.
Description
status. Use this when the slave configured in the data link is powered at a timing slower than the
master.
turned off when communication can be normally received.
FC6A S MICROS
ERIES
Reset Status
Underflow
Count Direction Flag
U ' M FC9Y-B1722
MART SER S ANUAL
6: D
When Power
Stopped OFF
Cleared Cleared
Cleared Cleared
Cleared Cleared
Cleared Cleared
Cleared Cleared
Cleared Cleared
Cleared Cleared
Cleared Cleared
Cleared Cleared
— —
Operating Cleared
— —
Maintained Cleared
Maintained Cleared
Maintained Cleared
— —
EVICES
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
—
R/W
—
R
R
R
—
6-9