Mitsubishi MELSEC Q Series Reference Manual page 340

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3 WHEN COMMUNICATING USING THE QnA COMPATIBLE 3E/3C/4C FRAMES OR 4E FRAME
(j) Monitoring condition value
This value designates the target status/numerical value of the monitoring
condition (i) when condition agreement transmission is designated in
programmable controller CPU monitoring function (c).
• When monitoring device is a word device: Designate the monitoring
condition value by a numerical value
• When monitoring device is a bit device: Designate the monitoring
condition value using a numerical value corresponding to on/off
1) Data communication in ASCII code
The value shown below is converted to an 4-digit (hexadecimal) ASCII
code and sequentially transmitted beginning from the most significant
byte "0".
2) Data communication in binary code
The 2-byte value shown below is transmitted from the low byte (L: bits
0 to 7).
3) Designate "0000" or 0000
designated in programmable controller CPU monitoring function (c).
4) The following table summarizes the values that can be designated and
the corresponding monitor condition.
Designated value
0000
H
0001
H
000 to FFFF
H H
(k) Data read (device data transmitted to an external device as monitoring
results)
1) This is device data for one monitoring target block read from the
programmable controller CPU.
2) Refer to Section 3.17.4 for the order and contents of each data.
For a bit device, the data for the number of registered points is read in
word units (one points = 16 bits).
For a word device, the data for the number of registered points is read
in one-point units.
(l) Data read (CPU status data transmitted to an external device as monitoring
results)
1) This is status information of the programmable controller CPU read
from the programmable controller CPU.
2) Data communication in ASCII code
The value shown below is transmitted in 4-digit (hexadecimal) ASCII
code from the programmable controller CPU side. (Refer to Section
3.17.4.)
3) Data communication in binary code
The 2-byte value below is transmitted beginning from the
programmable controller CPU side. (Refer to Section 3.17.4.)
4) The following table shows the correspondence between the data read
and the programmable controller CPU status.
Data read
0000 Operating normally
H
0001 Module warning generated
H
Module error/module system error
0002
H
generated
when constant cycle transmission is
H
Monitoring condition value or status
OFF
ON
Numerical value
Status of programmable controller CPU
Type of monitoring device
Bit device
Word device
Remarks
–
Check the error description and take an
action by referring to the Q/LCPU manual.
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