4-4
4-2 Specifications for Non-procedural FB
4-2-2 FB format
_C_free
Open
Send request
Send data length
Send data
Receive data
Communication parameter
RAS information
Communication ready
Open status
Send end
Send error
Send status
Receive end
Receive error
Receive status
Receive data length
RS-485 station No.
Send data
Receive data
Communication parameter
RAS information
(BOOL) OPEN
(BOOL) S_REQ
(INT) S_LEN
(BOOL) OK
(WORD) O_STS
(BOOL) S_END
(BOOL) S_ERR
(WORD) S_STS
(BOOL) R_END
(BOOL) R_ERR
(WORD) R_STS
(INT) R_LEN
(INT) STN_NO
Input terminal name Output terminal name
IN-OUT
terminal
(Note 2)
(Note 1)
(_C_SND_TYP11) S_DAT
(_C_RCV_TYP11) R_DAT
(_C_PAR_TYP11) PARA
(_C_work_TYPE11) RAS
* ( ) indicates data type.
Note 1: All non-procedural FBs have the same pin assignment.
Note 2: Only the FB pins necessary for control are used by connecting variables to them. However, be sure to connect
variables to the IN-OUT pins.
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