Omron V750 series, Руководство по подключению к сети

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9. Program
60
● ReceiveCheck function block
(General-purpose Ethernet communications receive processing)
Instruction Meaning ST expression
ReceiveCheck
General-purpose Ethernet
Communications
receive processing
ETN_ReceiveCheck_instance( Execute,
Recv_Data,
Recv_Buff,
Error,
ErrorID,
ErrorIDEx);
[Internal variables]
Name Data type Description
Receive_Check STRING[5] FCS receive value:
FCS receive result of the receive data
Calc_Check STRING[5] FCS calculation value:
FCS calculation result of the receive data
[Input/Output]
Name
I/O
Data type Description
Execute Input BOOL
Execution flag: The function block is executed when this
variable changes to TRUE and it is stopped when this
variable changes to FALSE.
tLength Input UINT Receive data length: The byte length of the receive data
Recv_Data In-out STRING[256]
Receive data storage area: An area that stores the
receive data after detection
Recv_Buff In-out STRING[256]
Receive buffer: An area that temporarily stores the
receive data that is used for detection.
ErrorID In-out WORD
Error code: This variable stores 16#1000 for a destination
device error and 16#2000 for an FCS error.
ErrorIDEx In-out DWORD
Expansion error code:
This variable stores the FCS determination result or
destination device error code.
Busy Output BOOL Busy
Done Output BOOL
Normal end
Not used
(Not used in this program.)
Error Output BOOL Error end: TRUE when an error occurs.
[External variable]
None