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396
Timing
Instruction
received
Transmission
completes
normally
Instruction
received
Transmission
error
Instruction
received
Enabled
Flag
Execution
Error Flag
Data is transmitted on a network when SEND(192), RECV(193), or CMND(194)
is executed. Final processing for transmissions/receptions is performed during
servicing of Link Units.
The CVM1D PCs always operate in synchronous operation, so it isn’t necessary
to take steps to synchronize data processing as in the CVM1 and CV-series
PCs.
To ensure successful SEND(192)/RECV(193) operations with more than one in-
struction for a single port, your program must use the Enabled Flag and Error
Flag to confirm that execution is possible. The following program shows one ex-
ample of how to do this for port 4 in a SYSMAC NET Link System. The program is
effective when both bit 000000 and the Port 4 Enable Flag (A50204) are ON.
Data Processing for
Network Instructions
Programming Example:
Multiple Instructions
Network Instructions
Section 5-34
Summary of Contents for CVM1D
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