If the function block detects the signal state "1" at the R parameter, the current send job is
aborted and the RECV_440 FB is set to the initial state. Receiving is deactivated as long as the R
parameter has the signal state "1".
The LADDR parameter denes the CP 440 to be addressed.
Error Display on the RECV_440 FB
The NDR output shows "request completed without errors/data accepted" (all data read). ERROR
indicates whether an error has occurred. In STATUS the event number is displayed in the event
of an error. If no error occurs the value of STATUS is 0. NDR and ERROR/STATUS are also output
in response to a RESET of FB RECV_440 (LEN parameter == 16#00). In the event of an error, the
binary result BR is reset. If the block is terminated without errors, the binary result has the status
"1".
Note
The RECV_440 function block does not have a parameter check. If there are invalid parameters,
the CPU branches to the STOP mode.
Block call
STL representation LAD representation
CALL RECV_440, I_RECV_440
RECV_440, I_RECV_440
EN
EN_R
R
LADDR
DB_NO
DBB_NO
ENO
NDR
ERROR
LEN
STATUS
L_TYP
EN_R : =
R : =
LADDR : =
DB_NO : =
DBB_NO : =
NDR : =
ERROR : =
LEN : =
STATUS : =
Note
The parameters EN and ENO are only present in the graphical representation (LAD or FBD). The
block is started with EN = TRUE. If the function is completed without errors, ENO = TRUE is set.
To process these parameters, the compiler uses the binary result BR. The binary result is set to
signal state "1" if the block was terminated without errors. If there was an error, the BR is set to
"0".
Communication via Function Blocks
6.3 Using the Function Blocks
Point-to-point connection CP 440 Installation and Parameter Assignment
80 Equipment Manual, 03/2022, A5E00057742-AE
To Next Page
Loading...
