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FX3S/FX3G/FX3GC/FX3U/FX3UC Series
Programming Manual - Basic & Applied Instruction Edition
4 Devices in Detail
4.4 State Relay [S]
3. Annunciator type
Annunciator type state relays can be used as outputs for external fault diagnosis.
For example, when an external fault diagnosis circuit shown in the figure below is created and the contents of the
special data register D8049 are monitored, the smallest number out of the active state relays S900 to S999 is stored in
D8049.
If two or more faults have occurred, the smallest state number having a fault is displayed at first. When the fault is
cleared, the next smallest state number having a fault is stored.
While the special auxiliary relay M8049 is not driven, annunciator type state relays can be used as latched (battery
backed) type state relays in sequence programs in the same way as general type state relays.
In the SFC programming mode in the FX-PCS/WIN(-E), however, S900 to S999 cannot be programmed as a
processes flow in SFC diagrams.
M8000
RUN monitor
M8049
Y000 X000
FNC 46
ANS
T 0 K 10 S900
X002
FNC 46
ANS
T 1 K 20 S901
X003 X004
FNC 46
ANS
T 2 K100 S902
M8048
Y010
X005
FNC 47
ANRP
X001
When the special auxiliary relay M8049 is driven,
monitoring becomes valid.
•
If the forward end detection input X000 is not
activated within 1 second after the forward output
Y000 is driven, S900 is activated.
•
The state relays activated by the external fault
diagnosis program can be turned OFF by the reset
button X005.
Every time X005 is set to ON, the active annunciator
with the smallest number is reset in turn.
If both the upper limit detection input X001 and the
lower limit detection input X002 are deactivated at the
same time for 2 seconds or more, S901 is activated.
•
In a machine whose tact time is less than 10 seconds,
if the switch X004 which is designed to be activated
during one-cycle operation of the machine is not
activated while the continuous operation mode input
X003 is ON, S902 is activated.
•
When any annunciator among S900 to S999 turns
ON, the special auxiliary relay M8048 is activated and
the fault display output Y010 is activated.
•
•