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