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MELSEC-Q
3 SPECIFICATIONS
(4) X4: Configuration Error
X4 checks for a configuration error.
A configuration error occurs if the projected slave list (LPS) and detected slave
list (LDS) are different in the configuration contents.
On detection of a configuration error in the AS-i system, the QJ71AS92 turns ON
the corresponding bit of the slave list (addresses: 1DH to 20H) that differs from
the buffer memory settings and turns X4 ON.
X4 automatically turns OFF when the configuration error is all resolved.
When X4 is ON, check whether the projected slave list (LPS) is the same as the
detected slave list (LDS), for example.
OFF : No configuration error
ON : Configuration error detected
X4
Slave list that differs
from settings
(1D
H
to 20
H
)
OFF
ON
Bit of corresponding slave number turns ON
0
0
Configuration error
detection
Restoration from
configuration error
No configuration
error
Configuration error occurred
(During slave disconnection)
No configuration
error
*1
Input data of
normally ON input
*1: Shows the timing with the input data when the normally-ON input slave is disconnected.
OFF
ON
(5) X5: AS-i Power Fail
X5 checks the AS-i power supply status.
The QJ71AS92 turns X5 ON when the voltage supplied by the AS-i power supply
is insufficient. It turns OFF automatically when the supplied voltage is restored.
When X5 is ON, check the rated current value of the AS-i power supply, the
wiring, and the overall distance of the system.
OFF : AS-i power supply normal
ON : AS-i power supply abnormal
X5
OFF
ON
AS-i power supply normal
AS-i power supply
fault detection
AS-i power supply abnormal
AS-i power supply
restoration detection
AS-i power supply normal
For details of the AS-i power supply specifications, contact the manufacture of
the AS-i power supply used.
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