I/O Signal Functions - Mitsubishi AJ65BT-64RD3 User Manual

3. SPECIFICATIONS
3.4.2
The function of each remote I/O signal for the AJ65BT-64RD is explained below.
(1) Remote Input signal
Device No.
RXn0 to RXn3
RXn4 to RXn7
RXn8
RXn9
RX (n+7) 8
RX (n+7) 9
RX (n+7) A
RX (n+7) B

I/O signal functions

Signal name
The conversion completion flag turns on when the detected temperature value at all
conversion enabled channel is stored in the remote register after power on or a
hardware reset.
If the travel average processing is running, it will turn on when the detected
temperature value is converted and stored in the remote register after the travel
average processing has completed. The conversion completion flag changes
CH.
according to the conditions listed below.
conversion
• When conversion disabled is changed to enabled
completion flag
The temperature detection of the enabled channels will be commenced.
After the detected temperature values are stored in the remote register, the
conversion completion flag is turned on for the corresponding channel.
• When conversion enabled is changed to disabled
The conversion completion flag is turned off for the corresponding channel.
For the values stored in the remote register, the data immediately prior to the
disable setting are retained.
For the platinum temperature-measuring resistor input circuit for all channels, when
only a single section of the I/O signal lines including the platinum temperature-
measuring resistor is broken, the wire breakage detection flag is turned on for the
corresponding channel.
The detected temperature value when a wire breakage detection flag is turned on will
CH. wire be maintained at the value immediately prior to the wire breakage, and then the
breakage conversion completion flag will be turned off.
detection flag
After the wire breakage has been removed, the wire breakage detection flag may be
turned off by turning on the error reset request flag.
Also, after the breakage has been fixed, the updating of detected temperatures value
will be resumed regardless of whether or not the wire breakage detection flag is reset,
and after the first update has been completed the conversion completion flag will turn
on once again.
After power on or a hardware reset, the internal memory (E
storage) is checked, and it turns on if there is an error.
E 2 PROM
At such times, the conversion function will stop.
abnormal flag
When this flag turns on, the error reset request flag may not be used to reset (off)
because the module itself is malfunctioning (hardware error).
Turns on during test mode.
Test mode flag
Turns off when reverted to normal mode.
After power on or a hardware reset, this is turned on because the AJ65BT-64RD
Initial data
requests the initial data setting .
processing
After the initial data processing is complete (initial data processing request flag
request flag
RY(n+7)8 is turned on), it turns off.
Turns on when initial data was required to change (initial data setting request flag
Initial data
RY(n+7)9 is turned on).
processing
After the initial data setting request flag is turned off when initial data setting is
request flag
complete, this also turns off.
Turns on when wire breakage detection flag or E
Error status
After the cause of the error has been removed, the flag may be reset (off) by turning
flag
on the error reset request flag, but since the E
flag may also not be reset.
After power on or a hardware reset, this flag turns on when the initial data setting is
complete and the detected temperature value at all conversion-enabled channel has
been stored in the remote register.
Remote
Will not turn on when all channels are conversion disabled.
READY
It will turn off for two seconds when the offset/gain switch is set to [OFFSET] during
test mode or when changed from [GAIN] to [SET].
Used as an interlock for read in respect to the master module.
Description
3-12
MELSEC-A
2
PROM for offset/gain value
2
PROM error flag turns on.
2
PROM error flag cannot be reset, this