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8 BUILT-IN ETHERNET FUNCTION INSTRUCTIONS
8.3 Predefined Protocol Support Function Instruction
• This instruction executes the protocol registered using the engineering tool. Using the connection specified by (s1), the
instruction executes the protocol in accordance with the control data stored in the device specified by (s3) and later.
• The instruction continuously executes as many protocols as specified by (s2) (a maximum of 8 protocols) at one time.
• The number of executed protocols is stored in the device specified by (s3)+0.
• The protocol execution status can be checked with the predefined protocol support function execution status check area
(Un\G350 to Un\G669). ( MELSEC iQ-R Ethernet User's Manual (Application))
• The execution status and the completion status of the SP.ECPRTCL instruction can be checked with the completion device
(d) and the completion status indication device (d)+1.
• The following figure shows the SP.ECPRTCL instruction execution timing.
• Protocol execution can be canceled by setting a protocol cancel request. The protocol cancel request is specified in the
predefined protocol support function execution status check area (Un\G350 to Un\G669). ( MELSEC iQ-R Ethernet
User's Manual (Application))
• Completion device (d)
This device turns on during END processing of the scan where the SP.ECPRTCL instruction completes, and turns off during the next END processing.
• Completion status indication device (d)+1
This device turns on or off depending on the completion status of the SP.ECPRTCL instruction.
When completed successfully: The device remains off.
When completed with an error: The device turns on during END processing of the scan where the SP.ECPRTCL instruction completes, and turns off during the
next END processing. In addition, an error code is stored in the device specified by (s3)+1.
END0 END0END0END0
OFF
OFF
OFF
OFF
ON
ON
Sequence scan
SP.ECPRTCL instruction
Completion device (d)
Completion status
indication device (d)+1
Completed successfully
1 scan
Executing a protocol(s)
Execution of the instruction
At each execution, the SP.ECPROTCL instruction consecutively executes the number of protocols
specified by (s2) (up to eight protocols) in the order specified with the control data.
Protocol ProtocolProtocol ProtocolProtocol
(Protocol(s) being executed)
(5: Execution completed)
Protocol execution
status
Completed with an error
1: Cancellation requested 2: Cancellation completed
Protocol cancellation
(for the connection number
specified by (s1))
Cancelling the protocol being
executed in the connection
specified by (s1)
User
CPU module operation
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