Mitsubishi MELSEC Q Series Reference Manual page 337

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3 WHEN COMMUNICATING USING THE QnA COMPATIBLE 3E/3C/4C FRAMES OR 4E FRAME
(c) Programmable controller CPU monitoring function (cycle monitoring
function)
This value designates the transmission timing (constant cycle transmission
or condition agreement transmission) when transmitting the resulting
monitoring information of the programmable controller CPU (device
information or CPU status information) to an external device.
1) Data communication in ASCII code
The value shown below is converted to a 2-digit (hexadecimal) ASCII
code and sequentially transmitted beginning from the most significant
digit ("0").
2) Data communication in binary code
The 1-byte value is transmitted.
3) The following table summarizes the values that can be designated and
the corresponding transmission method employed by the
programmable controller CPU monitoring function.
Designated value
01
H
02
H
4) The time interval to read the information from the programmable
controller CPU designated by the data items (a) and (b) above is also
used as the transmission interval for constant cycle transmission.
5) The transmission timing for condition agreement transmission is
designated by the data item (h) below.
The conditions for condition agreement transmission designated by the
data items (i) and (j) below.
6) When a device monitoring result is sent by a condition agreement
transmission, the head device of each block designated by (g) below is
monitored.
(d) Programmable controller CPU monitoring transmission measure
This value designates the method for transmission measure the results of
programmable controller CPU monitoring to an external device.
In the MC protocol, only the data given below for "data transmission" can
be designated (data transmission: transmission of device data and CPU
status data).
1) Data communication in ASCII code
"00" is transmitted.
2) Data communication in binary code
The 1-byte value (0
(e) Number of registered word blocks and number of registered bit blocks
These values designate the number of blocks of a word device (number of
registered word blocks) and the number of blocks of a bit device (number of
registered bit blocks) to be registered to the C, when monitoring device data
and transmitting the results while monitoring.
1) Data communication in ASCII code
The number of blocks is converted to a 2-digit (hexadecimal) ASCII code
and transmitted sequentially beginning from the most significant digit ("0").
2) Data communication in binary code
A 1-byte value that
Transmission method used by the
programmable controller CPU
monitoring function
Constant cycle transmission
Condition agreement transmission
) is transmitted.
H
the number of blocks is transmitted.
indicates
Information transmission timing
Transmits information in the cycle time interval
Transmits information when the information
matches with the designated condition
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