Rs-422A/485 Ports - Omron SYSMAC CS1W-SCB41-V1 Operation Manual

Changes from Previous Products
Previous Model number
products
CVM1 or CV- CVM1/CV-CPU@@
series CPU
Units
CVM1 or CV- CV500-LK201
series Host Link
Unit
4-5-2

RS-422A/485 Ports

Previous Model number
products
C-series Host Link 3G2A5-LK201-E
Units
C200H-LK202
3G2A6-LK202-E
C200HX/HG/HE C200HW-COM@@-E
Communications
Board
138
Wiring
No changes have been made
in wiring.
Port 1:
The connector has been
changed from a 25-pin to a
9-pin connector.
Port 2 set for RS-232C:
The SG signal has been
changed from pin 7 to pin 9.
Note The number of words that can be read and written per frame (i.e., the text
lengths) when using C-mode commands is different for C-series Host Link
Units and CS/CJ-series Serial Communications Boards/Units. A host com-
puter program previously used for C-series Host Link Units may not function
correctly if used for CS/CJ-series PLCs. Check the host computer program
before using it and make any corrections required to handle different frame
text lengths. Refer to the CS/CJ-series Communications Commands Refer-
ence Manual (W342) for details.
Take the following differences into consideration when changing from an exist-
ing Host Link System to one using an RS-422A/485 port on a CS/CJ-series
Serial Communications Board (CS1W-SCB41-V1 port 2, CS1W-SCU31-V1
port 1 or 2, CJ1W-SCU41-V1 port 1, or CJ1W-SCU31-V1 port 1 or 2).
Wiring pins have been
changed as shown below.
SDA: Pin 9 to pin 1
SDB: Pin 5 to pin 2
RDA: Pin 6 to pin 6
RDB: Pin 1 to pin 8
SG: Pin 3 to
Not connected
FG: Pin 7 to pin
Connector hood
No changes have been made
in wiring.
Changes required for CS/CJ-series product
It may be possible to use the host computer
programs without alteration as long as the
same communications settings (e.g., baud rate)
are used. It may be necessary, however, to
change programs to allow for different CS/CJ
command specifications.
The following changes are necessary for
half-duplex transmissions that use CD.
Check the system for timing problems when
using SEND, RECV, or CMND to initiate com-
munications from the PLC or timing problems in
sending commands from the host computer. If
necessary, switch to full-duplex transmissions.
The following changes are necessary for
full-duplex transmissions that do not use
CD.
Half-duplex It may be possible to use the host
computer programs without alteration as long
as the same communications settings (e.g.,
baud rate) are used. It may be necessary, how-
ever, to change programs to allow for different
CS/CJ command specifications.
Changes required for CS/CJ-series product
Wiring
It may be possible to use the host computer
programs without alteration as long as the
same communications settings (e.g., baud
rate) are used. It may be necessary, however,
to change programs to allow for different text
lengths in frames or different CS/CJ com-
mand specifications. (See note.)
It may be possible to use the host computer
programs without alteration as long as the
same communications settings (e.g., baud
rate) are used. It may be necessary, however,
to change programs to allow for different CS/
CJ command specifications.
Section 4-5
Other
Other