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MELSEC-A
3 SPECIFICATION
3.5.2 Functions of the remote I/O signals
Table 3.5 explains the functions of the remote I/O signals of the AJ65SBT-64AD.
Table 3.5 Remote I/O Signal Details (1/2)
Device No. Signal Name Description
RXn0
to
RXn3
CH.
A/D Conversion
completion flag
The A/D conversion completion flag turns on at completion of the A/D conversion of
the corresponding channel when the initial data setting request flag (RY(n+1)9) turns
from off to on after power-on.
The A/D conversion completion flag processing is processed only once when the A/D
conversion enable/prohibit specification is changed.
When changing the A/D conversion from prohibit to enable:
When the average processing is specified, the flag turns on after completing the
average processing of the number of times or time, and storing the A/D conversion
digital value in the remote register.
When changing the A/D conversion from enable to prohibit:
The corresponding channel's A/D conversion completion flag turns off.
RXn4
to
RXn7
CH.
range error flag
Turns on when the value set for input range setting is outside the setting range.
Turns on if all channels are not set to any of "user range settings 1 to 3" at offset/gain
setting (in the test mode).
RXnC
E
2
PROM write error flag
Turns on if the number of E
2
PROM write times exceeds its limit (100,000 times per
channel). If this flag has turned on, this module itself has failed (hardware fault) and
therefore this flag cannot be reset (turned off) by the error reset request flag.
RXnF Test mode flag
Turns on in the test mode.
(Used for interlock to prevent wrong output during offset/gain setting.)
RX(n+1)8
Initial data processing
request flag
After power-on, the initial data processing request flag is turned on by the AJ65SBT-
64AD to request the initial data to be set.
Also, after the initial data processing is complete (initial data processing completion
flag RY(n+1)8 ON), the flag is turned off.
RX(n+1)8
Initial data processing request flag
RY(n+1)8
Initial data processing completion flag
RX(n+1)9
Initial data setting completion flag
RY(n+1)9
Initial data setting request flag
RX(n+1)B
Remote ready
: Performed by sequence ladder
: Performed b
y
AJ65SBT-64AD
RXn0 to RXn3
CH. A/D conversion completion flag
RX(n+1)9
Initial data setting completion
flag
When the initial data setting request (RY(n+1)9 ON) is made, the flag turns on after
the initial data setting completion is done.
Also, after the initial data setting is complete, the initial data setting completion flag
turns off when the initial data setting request flag turns off.
n: Address allocated to the master module by the station number setting.