LSIS XBE-DC08A, User Manual

Page: 1056 / 1284

Chapter 2 Built-in Cnet communication
2-58
B
u
ilt
-in
C
omm
1) Direct variable continuous reading (R(r)SB)
This is a function that reads the PLC device memory directly specified in accord with memory data type. With this, data
is read from specified address as much as specified continuously.

PC request format
Format
name
Heade
r
Station
No.
Command
Command
type
Device length Device Number of data
Tail
Frame
check
Ex. of
frame
ENQ H10 R(r) SB H06 %MW100 H05 EOT
BCC
ASCII
value
H05
H3130 H52(72)
H5342 H3036
H254D5731
3030
H3035 H04
•
Number of data specifies the number to read according to the type of data. Namely, if the data type of
device is word and number is 5, it means that 5 words should be read.
•
In the number of data, you can use up to 60 words (120Byte).
•
Protocol of continuous reading of direct variable doesn't have number of blocks.
•
Bit device continuous reading is not supported.
Item Description
BCC
When command is lowercase(r), only one lower byte of the value resulted by adding 1
Byte each to ASCII values from ENQ to EOT is converted into ASCII and added to
BCC.
Device length
(Length of
device name)
This indicates the number of name's characters that means device, which is allowable
up to 16 characters. This value is one of ASCII converted from hex type, and the
range is from H01 (ASCII value:3031) to H10 (ASCII value:3130).
Device name
Address to be actually read is entered. This must be ASCII value within 16 characters,
and in this name, digits, upper/lowercase, and '%' only are allowable to be entered.
Note