Omron V700-HMD13 series User Manual page 42

Section 4
Data Read/Write with ID Tag
Configuration involving link unit-OMRON original 1:N protocol
When intending to operate a link unit, OMRON original 1:1 protocol format is prefixed with [SOH] and Node
No. and suffixed with a check code.
Command frame structure
SOH Node No.
$01
∗ Transmit the data such that the inter-character spacing is less than 200 ms. Otherwise, previously
received characters are ignored.
Node No.
This entry indicates the Node No. defined by the DIP SW on the link unit.
Check code
Characters beginning with a character next to [SOH], ending with a one immediately before the check
code, is each transformed into 8-bit data through Exclusive-OR logic (ExOR), and the 8-bit data is con-
verted into two ASCII code characters.
Ex: 01020000000600 (check code)
Check code = "05"
30h (ExOR) 31h (ExOR) 30h (ExOR) 32h (ExOR) 30h (ExOR) 30h (ExOR) 30h (ExOR) 30h
Response frame structure
SOH Node No. Command Parameter 1
$01
(Examples of command execution)
A case where the data in page 1 is read out, with IDRWH directly connected to upstream controller
Command : 0 1 0 0 0 0 0 0 0 0 0 4 [CR]
Response : 0 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 [CR]
A case where the data in page 1 is written, with IDRWH connected to upstream controller via link unit
Command : [SOH] 0 1 0 2 0 0 0 0 0 0 0 0 0 4 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 0 1 [CR]
Response : [SOH] 0 1 0 0 0 1 [CR]
V700-L11
40
User's Manual
Command
(ExOR) 30h (ExOR) 30h (ExOR) 30h (ExOR) 36h (ExOR) 30h (ExOR) 30h = 05h
Page 1
Read
command designation
Read data
Response
code
Node No. Write Page 1 designation
command
Node No. Check code
Response code
Parameter 1 Parameter n Check code CR
Parameter n Check code CR
Write data
$0D
(ASCII conversion) ↓
"0"(30h)"5"(35h)
$0D
Check code