11-9
11.1.2 Table of Special Internal Relays for FP-e
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.:
Matsushita
IEC
Name
Description
R9000
%MX0.900.0
Self-diagnostic error
flag
Turns on when a self-diagnostic error occurs.
⇒
The content of self-diagnostic error is stored in DT90000.
R9001
%MX0.900.1
Not used
-
R9002
%MX0.900.2
Not used
-
R9003
%MX0.900.3
Not used
-
R9004
%MX0.900.4
Not used
-
R9005
%MX0.900.5
Backup battery error
flag
(non-hold)
Turns on for an instant when a backup battery error occurs.
R9006
%MX0.900.6
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
%MX0.900.7
Operation error flag
(hold)
Turns on and keeps the on state shen an operation error
occurs.
⇒
The address where the error occurred is stored in DT9017.
(Indicates the first operation error which occurred).
R9008
%MX0.900.8
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 DT9018. The contents change each time a new error
occurs.
R9009
%MX0.900.9
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
%MX0.900.10
> Flag
Turns on for an instant when the compared results become
larger in the comparison instructions.
R900B
%MX0.900.11
= 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
%MX0.900.12
< Flag
Turns on for an instant when the compared results become
smaller in the comparison instructions.
R900D
%MX0.900.13
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 flag turns off when the trigger for auxiliary timer
instruction turns off.
R900E
%MX0.900.14
Tool port
communication error
Turns on when a communication error at Tool port has
occurred.
R900F
%MX0.900.15
Constant scan error
flag
Turns on when the 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.
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