Lenze Global Drive PLC Developer Studio - Manual (Page 20)

LenzeFpiDrv.lib function library
Functions
3.3 Send data (L_Rs232SendData)
3−5
L
LenzeFpiDrv.lib EN 1.1
Example 1
Calling up the function in ST for a single send order:
g_nSendStatus: = L_Rs232SendData(30,
ADR(g_abySendData),
g_wNumberOfBytesToSend);
Example 2
Calling up the function in ST with monitoring of the last send order:
(* read state of sendprocess and send new data *)
(* if last sendprocess is finished *)
IF L_Rs232GetSendState (30) = 0 THEN
g_nSendStatus: = L_Rs232SendData(30,
ADR(g_abySendData),
g_wLength);
END_IF
Note!
Addresses within the memory range of the operating system are not permitted with the functions
L_Rs232SendData and L_Rs232ReceiveData !
Problem:
Also the system variable addresses (inputs/outputs) are in the memory
range of the operating system, in the following figure it is the system
variable AIN1_nIn_a: Remedy:
Instead of using a system variable address, use an intermediate
variable address to copy the corresponding system variable value to.
L_Rs232SendData
wDrvNr
pabySendDataMemory
wNumberOfBytes
ADR
30
2
AIN1_nIn_a
L_Rs232SendData
wDrvNr
pabySendDataMemory
wNumberOfBytes
ADR
30
2
nAnalogInput
AIN1_nIn_a nAnalogInput