Omron V600 Series User Manual page 94

Section 5
Communications
■ Frame Dividing Method
Divided the command into frames as shown below if the command is longer than 271 characters.
1. Divide the command so that each frame is 271 characters or less.
2. Attach a terminator (*CR) to the last frame (frame n). Attach a delimiter (CR) to all other frames.
3. The first frame (frame 1) must contain the command code, data code specification, Read/Write Head
and channel specifications, and the start address. If any of these are missing, a command input error
will occur. The write data does not have to be contained in the first frame.
4. Make sure that data is divided correctly without any single frames containing only AA*CR or XZ*CR
(i.e., @Controller No., AA, FCS,*CR or @Controller No., XZ, FCS,*CR).
5. The controller number and FCS must be included in all frames.
Frame 1
@Controller No.
Frame 2
@Controller No.
: :
Frame n-1
@Controller No.
@Controller No.
Frame n
RFID System
92
Operation Manual
Host device
1 frame = 271 characters max.
XW A/H 1/2 Start address
Write data 2
Write data n-1
Write data n
FCS
Write data 1
CR
FCS
CR
FCS
CR
FCS CR
*
ID Controller
@Controller No. FCS CR
@Controller No. FCS CR
:
@Controller No. FCS CR
@Controller No. FCS CR
@Controller No. FCS CR