LSIS XBE-DC08A, Руководство пользователя, Страница: 713 / 1284

Po
sit
io
n
in
g
Chapter 8 Functions
8-160
8.7.4 Write/Read Variable Data
Parameter, operation data, CAM data can be read by “Read Variable Data” command and written by “Write Variable Data”
command directly.
(1) Read Variable Data
(a) You read data you want by designating module internal memory address of parameter, operation data, CAM data
directly.
(b) Reads data as many as “Block size” starting position set in “Read address” with WORD unit to CPU among parameter,
operation data, CAM data. In case “CNT” is higher than 2, reads blocks with interval of “Block offset” starting “Read
address” as many as “CNT”-1.
(c) Max. data size (block size x No. of block) you can read with one command is 128 WORD
(d) “Read Variable Data” command can be executed in operation.
(e) Auxiliary data setting of “Read Variable Data” command
Item Setting value Description
Read address 0 ~ 49586 Sets head address of Read Data
Block offset 0 ~ 49586 Sets offset between blocks of Read Data
Block size 1 ~ 128 Sets size of block
No. of block 1 ~ 128 Sets No. of Read Block
Block 1
Block 2
Block n
Block 1
Block 2
Block n
Data address
Block size
Block offset
No. of block
•
•
•
•
Axis 1 operation data
Common parameter
•
•
Axis 4 operation data
CAM data
0
49586
Operation parameter
128 word
(f) Restriction
In the following case, error occurs and can’t execute “Read Variable Data” command
■ Data setting error (Error code: 711)
▪ Read data size (Block size x No. of block) is 0 or higher than 128 WORD.
▪ Read data address [Read a {block offset x (No. of block -1)} + Block size is higher than last address value
(49586)
Note
If you execute “Read Variable Data” command in XGB PLC, Read data from positioning module is saved in common
area. To save in device for using in PLC program, use GETM command [Read address: 0, data size: Read data size
(DWORD)]
In XGB PLC, Read data is saved in register set in Function Block automatically.