26
Section 2
2.
3 ID link
uni
t:
M
o
de
l V70
0
-L11
V700-L11
User's Manual
Section 2
Unit Specifications
2.3.2 Interface specifications
(1) Upstream connector connection port
(Pin arrangement)
NOTE: The base of connector does not continue to the GR (frame ground).
∗
Control an RS signal from an upstream controller as described below.
Characteristic
Specification
Connector specification
9-pin D-SUB connector plug, with #4-40UNC lock screws
Communication standard
RS-232C
Synchronization
Asynchronous mode, start-stop synchronization
Communications control
standard
OMRON original 1:N protocol
Baud rate
38400, 19200, 9600, 4800 bps (selectable with DIP-SW)
Character format
Start bit
Data bit
Parity bit
Stop bit
Total
1
8
None
1
10
Error control
FCS (Frame Check Sequence), vertical parity
Total cable length
15 m max.
Pin No.
Signal name
Symbol
Direction
Comment
1
2
Receive data
RD
Input
3
Send data
SD
Output
4
---
---
---
5
Signal ground
SG
---
6
7
Request send
RS
Output
Normally OPEN during service
8
Clear to send
CS*
Input
9
---
---
---
RS signal control scheme
For a 1:N connection involving a link unit, it is necessary to add an normal controlled RS signal from an
upstream controller to a CS signal. The RS signal must be turned OFF within 15 msec after completion of
data transmission. Otherwise, this configuration does not operate correctly.
1
9
ON only when the upstream controller is sending data.
15 ms or less
Upstream RS
Upstream SD