Omron CS Series Operator's Manual page 132

Outline of Serial Communications
Supported Serial Communications Instructions
TXD/RXD instruction
PMCR instruction
STUP instruction
SEND/RECV instructions
CMND instruction
I/O Memory Allocation
Hardware
CPU Unit
RS-232C port
(Port 2)
Serial Commu-
nications
Unit/Board
Serial Commu-
nications Board
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Note For the RS-232C port on the CPU Unit, if a protocol not supported by the CX-
Simulator in the PLC Setup settings is set, communications can not be per-
formed.
For the Serial Communications Board/Unit, if the Serial Communications
mode of System Setup is No-protocol, communications can not be per-
formed.
The instructions related to serial communications that can be used in a pro-
gram and their supporting status are shown below.
Instruction Support
Yes
No
Yes
Yes
Yes
The outline of I/O memory allocation for each piece of hardware and the sup-
porting status in the CX-Simulator are shown below. (Only for No-protocol
and Host Link)
Area
RS-232C Port Settings Selection
Communications mode
PLC Setup Area
Data bits/Stop bits/Parity/Baud rate
(RS-232C Port Set-
No-protocol mode delay
tings)
CPU Unit's Unit Number in Host Link Mode
No-protocol frame format
RS-232C Port Error Flag (A39204)
RS-232C Port Send Ready Flag (A39205)
RS-232C Port Reception Completed Flag (A39206)
RS-232C Port Reception Overflow Flag (A39207)
Auxiliary Area
RS-232C Port Reception Counter (A393)
RS-232C Port Restart Flag (A52600)
RS-232C Port Error Code (A528)
RS-232C Port Settings Changing Flag (A61902)
Port settings
Serial communications mode
Start bits/Data length/Stop bits/Parity/Baud rate
Setup Area
Send delay time
CTS control
Host Link unit number
Software Switches
Error log EEPROM error
Protocol data error
Staus Area
Port setting status
(I/O Memory Alloca-
Communications status
tions)
Transmission control signal status
Transmission error status
Restart Bit (A501: Unit, A60800: Inner Board)
Auxiliary Area
Port 1 and Port 2 Port Settings Change Bits (A620 to A636)
Auxiliary Area Error Details (A424)
Remarks
with No-protocol
NOP for instruction processing.
Slave initiation with Host Link (FINS communications)
Slave initiation with Host Link (FINS communications)
Allocation name
Yes: Supported No: Not supported -: Not used
Section 5-1
Support
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
-
No
No
Yes
-
Yes
Yes
Yes
Yes
No
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