FB_PN_IM4_Read
Using this function block the PROFINET controller reads all I&M4 data (Identification & Maintenance) from a device referenced via the Port input.
The frame structure of the I&M4 function corresponds to the index 0xAFF4 according to PROFINET standard.
VAR_INPUT
VAR_INPUT
bStart : BOOL;
NETID : T_AmsNetId;(* AMS Net ID from Controller *)
PORT : T_AmsPort; (* Port used by Controller to communicate with Device *)
END_VAR
bStart : The block is activated by a rising edge on this input
NETID : AMS Net ID of the controller
PORT : Port via which the controller communicates with the device (port = Device ID + 1000hex)
VAR_OUTPUT
VAR_OUTPUT
bBusy : BOOL;
st_IM_Signatur : STRING(54);
bError : BOOL;
iErrorID : UDINT;
END_VAR
bBusy : When the function block is activated this output is set. It remains set until a feedback is received. While Busy = TRUE, no new command will be accepted at the inputs.
st_IM_Signature : Returns the manufacturer signature stored for the device.
bError : If an error should occur during the transmission of the command, this output is set after the bBusy output has been reset.
iErrorID: Supplies an ADS error number when the output bError is set.
Requirements
Development environment | Target platform | PLC libraries to be linked |
|---|---|---|
TwinCAT v2.11.0 R3 | PC or CX (x86, ARM) | TcProfinetDiag.Lib |