Omron EJ1 User Manual page 152

Programless Communications
Note
• RS-485
MELSEC
An/AnS/FX3UC-series PLC
RS-485
Signal
SDA
SDB
RDA
R
RDB
FG
• If noise immunity is a problem in communications, connect terminating
resistance of 110 to 125
2. Make the PLC settings.
When using an An/AnS-series PLC, use the switches on the front of the
Computer Link Unit to make the settings shown in the following table.
Station setting
Mode setting
Transfer specifications
(1) This setting is not used on the A1SJ71UC24-R2 or A1SJ71UC24-PRF.
(2) If any other settings are used, change the setting for the EJ1 to the same
settings.
(3) Refer to the user's manual for the PLC for setting methods.
Shield
RDA ( )
to pins 6 and 7 of port B on the EDU.
Switch
Data bits
Parity bit
Even/odd parity
Stop bits
Checksum
Write during RUN
Computer link/multidrop link
(See note 1.)
Communications rate
Section 5-1
EJ1N-HFU@-NFLK
B1
A1
B2
A2
B3
A3
B4
A4
B5
A5
B6
A6
RDB (+)
B7
A7
RS-485
B8
A8
B9
R
A9
Setting
00
Special protocol format 4
8 bits
Yes
Even
1 bit
Yes
Allowed
Computer link
19.2 kbps
127