Omron CJ1W-SCU32 Operation Manual page 249

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Additional Information
Flags Related to Instructions Addressed to Serial Communications Units
The changes and processing timing of flags related to instructions addressed to Units (Seri-
alSend and SerialRcv instructions) are shown below.
SerialSend Instruction
CPU Unit
Serial Communications Unit
Note Internally, the SerialSend instruction uses a command. Instruction processing is therefore
performed in peripheral servicing. To achieve this, sometimes multiple cycles are required
after the instruction is executed to process the send.
SerialRcv Instruction
Serial Communications Unit
CPU Unit
Note Internally, the SerialRcv instruction uses a command. Instruction processing is therefore per-
formed in peripheral servicing. To achieve this, sometimes multiple cycles are required after
the instruction is executed until the received data is stored in I/O memory.
Additional Information
Refer to the NJ-series Instructions Reference Manual (Cat. No. W502) for details on the instruc-
tions that are used in No-protocol Mode (SerialSend, SerialRcv, and SerialRcvNoClear).
CJ-series Serial Communications Units Operation Manual for NJ-series CPU Unit(W494)
SerialSend
_Port_isAvailable (Network
Communications Instruction Enabled Flag)
*_P1_NopSerialSendExecSta and
*_P2_NopSerialSendExecSta
(SerialSend Executing Flag)
Send processing
Port reception processing
*_P1_NopRcvCompleteSta and
*_P2_NopRcvCompleteSta
(Reception Completed Flag)
SerialRcv instruction
_Port_isAvailable (Network
Communications Instruction Enabled Flag)
Writing to I/O memory in the CPU Unit
6 No-protocol Mode
Instruction
executed.
Send
processing
Reception
processing
Instruction
executed.
Write
processing
6
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