ReadMemory
This FB reads consecutive memory locations from the camera. Requires an open control channel (e.g. by calling FB_VN_GevCameraControl.OpenCamera() before)
Syntax
Constructor:
ReadMemory(
OTCID oidITcVnGevImageProvider
)Execute main:
FB_Main()
FB_Main(
GVCP_REGISTER_ADDRESS nAddress,
USHORT nLength,
PVOID pBuffer,
bool bRead
)
FB_Main(
bool bRead
)
Inputs
|
Name |
Type |
Default |
Description |
|---|---|---|---|
|
nAddress |
|
The address of the first byte to read from the camera (must be 32-bit aligned) | |
|
nLength |
USHORT |
|
The number of bytes to read, starting with nAddress (must be a multiple of 4, not more than 536) |
|
pBuffer |
PVOID |
|
Pointer to the buffer where the read memory content is written to (The buffer must have a size of at least nLength bytes!) |
|
bRead |
bool |
|
Reading the memory is triggered by a rising edge at this input. |
|
nTimeout |
unsigned int |
VISION_ADS_TIMEOUT |
Indicates the time before the function is cancelled. |
Outputs
|
Name |
Type |
Description |
|---|---|---|
|
bBusy |
bool |
This output remains TRUE until the function block has executed a command, but at the longest for the duration supplied to the 'nTimeout' input. While bBusy = TRUE, no new command will be accepted at the inputs. |
|
bError |
bool |
This output is switched to TRUE as soon as an error occurs during the execution of a command. The command-specific error code is contained in ‘nErrorId’. If the function block has a timeout error, 'bError' is TRUE and 'nErrorId' is 1861 (hexadecimal 0x745). Is reset to FALSE by the execution of a command at the inputs. |
|
nErrorId |
ULONG |
Contains the ADS error code or the command-specific error code of the last executed command. Is reset to 0 by the execution of a command at the inputs. |
Required License
TC3 Vision Base
System Requirements
Development environment | Target platform | PLC libraries to include |
|---|---|---|
TwinCAT V3.1.4024.59 or later | PC or CX (x64) with PL50, e.g. Intel 4-core Atom CPU | Tc3_Vision |