Omron V680-CA5D01-V2 User Manual page 188

Responses Longer Than 256 Characters
If the response containing the read data is longer than 256 characters, the response is divided into
multiple frames as shown below. Only the final response frame ends in a terminator (*CR). All other
frames end in a delimiter (CR). When the ID Controller sends any response frame except for the last
one, it will wait for the host device to return a delimiter (CR). When the ID Controller receives the delim-
iter, it will send the next response frame.
Host device
Start address No. of read bytes
@Controller No. XR A/H 1/2
*CR
FCS
@Controller No.
@Controller No. FCS CR
@Controller No.
@Controller No. FCS CR
:
@Controller No. FCS CR
@Controller No.
@Controller No. FCS CR
@Controller No.
Communications
ID Controller
256 characters max. per frame
245 ASCII characters, 244 hex characters
Read data 1
XR 00
249 ASCII characters, 248 hex characters
Read data 2
Read data (n-1)
249 ASCII characters, 248 hex characters
Read data n
SECTION 5
Frame 1
FCS CR
FCS CR Frame 2
:
Frame
FCS CR
(n-1)
Frame n
FCS *CR
RFID System
185
User's Manual