NAiS FP Series, User Manual

Page: 270 / 326

FP
Σ
13.5 Table of Special Internal Relays
13 - 21
13.5 Table of Special Internal Relays
The special internal relays turn on and off under special conditions. The on and off
states are not output externally. Writing is not possible with a programming tool or an
instruction.
Relay No. Name Description
R9000 Self-diagnostic error flag Turns on when a self-diagnostic error occurs.
The content of self-diagnostic error is stored in DT90000.
R9001 Not used
R9002 Not used
R9003 Not used
R9004 I/O verification error flag Turns on when an I/O verification error occurs.
R9005 Backup battery error flag
(non-hold)
Turns on for an instant when a backup battery error occurs.
R9006 Backup battery error flag
(hold)
Turns on and keeps the on state when a backup battery
error occurs.
Once a battery error has been detected, this is held even after
recovery has been made.
It goes off if the power supply is turned off, or if the system is
initialized.
R9007 Operation error flag
(hold)
Turns on and keeps the on state when an operation error occurs.
The address where the error occurred is stored in DT90017.
(indicates the first operation error which occurred).
R9008 Operation error flag
(non-hold)
Turns on for an instant when an operation error occurs. The address
where the operation error occurred is stored in DT90018.
The contents change each time a new error occurs.
R9009 Carry flag This is set if an overflow or underflow occurs in the
calculation results, and as a result of a shift system instruction being
executed.
R900A > flag Turns on for an instant when the compared results become larger in
the comparison instructions.
R900B = flag Turns on for an instant,
- when the compared results are equal in the comparison instructions.
- when the calculated results become 0 in the arithmetic instructions.
R900C < flag Turns on for an instant when the compared results become smaller in
the comparison instructions”.
R900D Auxiliary timer instruction flag Turns on when the set time elapses (set value reaches 0) in the timing
operation of the F137 (STMR)/F183 (DSTM) auxiliary timer instruction.
The this flag turns off when the trigger for auxiliary timer instruction
turns off.
R900E Tool port communication error Turns on when communication error at tool port is occurred.
R900F Constant scan error flag Turns on when scan time exceeds the time specified in system
register 34 during constant scan execution.
This goes on if 0 has been set using system register 34.