Omron CJ1W-SCU32 Operation Manual page 78

2 Initial Settings and Allocations of Device Variable for CJ-series Unit
RS-232C Ports
Protocol
Communications
method
Synchronization
Baud rate
Connections
Transmission
distance
Interface
Protocol
Communications
method
Synchronous mode
Baud rate
Connection
configuration
Communications
distance
Interface
* The maximum cable length for RS-232C is 15 m. The RS-232C standard, however, does not cover baud rates
above 19.2 Kbps. Refer to the manual for the device to be connected to confirm support.
Connector Pin Layout
Pin No.
1 (*1)
2
3
4 (*2)
5 (*2)
6 (*3)
7 (*2)
8 (*2)
9
Shell (*1)
*1 Pin No. 1 and the shell are connected to the ground terminal (GR) of the Power Supply Unit inside of the Serial
Communications Unit. Therefore, ground the GR of the Power Supply Unit to ground the cable shield.
*2 You can monitor the status of the RS, CS, DR, and ER signals by using the device variables for CJ-series Unit.
For details, refer to 2-3-4 Device Variable for CJ-series Unit for Status. You can use the DR signal for any pur-
pose specified by the user since it does not affect the system operations.
*3 Pin 6 (5 V) is required when the NT-AL001 Link Adapter is connected. For details on connection methods, refer
to 3-2 Wiring.
*4 The DR signal is used to monitor the signal cable. You can also use it as a CD (carrier detection) signal.
2-4
Protocol macro
Full-duplex or half-duplex
Start-stop synchronization (asynchronous)
1200/2400/4800/9600/19200/38400/57600/
115200/230400 bps
1:1 (1:N is possible with Link Adapters)
15 m max. (*)
Complies with EIA RS-232C
No-proto-
Serial Gateway
col
Full-duplex ---
--- ---
1200/2400/4800/9600/19200/38400/57600/115200/230400 bps
1:1 (1:N is possible with Link Adapters)
15 m max. (*)
Complies with EIA RS-232C
Abbrevia-
Signal name
tion
FG Shield
SD Send data
RD Receive data
RS Request to send
CS Clear to send
5V Power supply
DR Data set ready (*4)
ER Data terminal ready
SG Signal ground
FG Shield
CJ-series Serial Communications Units Operation Manual for NJ-series CPU Unit(W494)
Modbus-RTU
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I/O
9
---
Output
Input
6
Output
Input
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Input
Output
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5
1