Mitsubishi MELSEC Q Series Reference Manual page 167

Condition designation
Data name
Number of word access points
Number of double word access points
(For designating read device)
(For word read)
Device code
Device
(For double word read)
Device code
Device
Monitor condition
Fixed value
File number to Attribute
SFC pattern to SFC step number
Sequence step number
(For designating word device value)
Device code to Monitor condition value
(for word)
(For designating bit device)
Device code to Monitor condition value
(for bit)
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3 WHEN COMMUNICATING USING THE QnA COMPATIBLE 3E/3C/4C FRAMES OR 4E FRAME
REMARKS
The following table summarizes the subsequent data that must be designated to the
character area depending on whether the subcommand monitor condition is
designated or not.
When monitor condition is
not designated
–
–
(Designation is unnecessary when the number of word access points is 0.)
–
(Designation is unnecessary when the number of double word access points is 0.)
–
–
: Designation necessary : Selective (When not designated, a default value is designated.)
2) Number of word access points and number of double word access
points
These data items are for designating the number of points to be read
in word units and in double word units.
The total number of points of each should be designated within the
limit on the number of points processed per communication shown in
Section 3.2 (1).
a) Data communication in ASCII code
Each number of points is converted to a 2-digit (hexadecimal) ASCII
code and transmitted beginning from the most significant digit.
(Examples)
5 points
20 points
b) Data communication in binary mode
The 1-byte value representing the number of points is used for
transmission.
(Examples)
5 points
20 points
c) When either of the number of access points set is 0, the relevant
device whose data is read and the device code do not have to be
designated.
When monitor condition is designated
When file and step When word device value is
numbers are designated
–
–
–
–
: Converted to "05" and transmitted from the "0".
: Converted to "14" and transmitted from the "1".
: 05 is transmitted.
H
: 14 is transmitted.
H
When bit device is
designated designated
–
–
–
–
: Designation unnecessary
–
–
–
–
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