Mitsubishi MELSEC Q Series Reference Manual page 338

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3 WHEN COMMUNICATING USING THE QnA COMPATIBLE 3E/3C/4C FRAMES OR 4E FRAME
3) Designate the device registration to the C24 within the following ranges
10 blocks
960 points  (total number of device points of all word blocks + total
4) The range for devices that can be registered is designated by item (g)
below for each block.
(f) CPU abnormal monitoring
This flag designates whether or not the programmable controller CPU
monitoring should include a monitoring of abnormalities in the
programmable controller CPU of the local station.
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 CPU abnormal monitoring designation.
Designated values
00 Do not monitor abnormalities in the programmable controller CPU of the local station.
H
01 Monitor abnormalities in the programmable controller CPU of the local station.
H
(g) Device code, monitoring head device, and number of registered points
(number of read points)
These values designate the ranges of the devices for each block for the
number of blocks designated by item (e), the number of registered word
blocks and number of registered bit blocks, when monitoring device data
and transmitting the results while monitoring the programmable controller
CPU.
When using the programmable controller CPU monitoring function to
monitor devices, the head device of each block is monitored.
Blocks designated for a word device : Head word device (for one word)
Blocks designated for a bit device
1) The device code is used for identifying the target devices in the
corresponding block.
2) The monitoring head device is used for designating the head of the
target device range in the corresponding block.
3) The number of registered points (number of read points) is used for
designating the number of points from the head in the target device
range in the corresponding device.
For a bit device, the number of points is designated by word units (one
point = 16 bits).
4) The designation method for each data is the same as when
reading/writing device memory described in Section 3.3.
Follow the designation method described in the explanation in (2) (c)
2) to 4) of Section 3.3.1.
 (total number of word blocks + total number of bit blocks)
number of device points of all bit blocks)
CPU abnormal monitoring designation
: Head bit device (for one bit)
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