1. SIMATIC WinAC
WinAC Slot T-Kit
Version 3.2
Shipment:
12/2001

2. Technology-Interface WinAC Slot 41x, V3.2 & WinAC Slot T-Kit, V3.2
Output
Area
4 KByte
Input
L FW 17
T POW 5000
L PIW 4096 T FW 16
READS7DWORD(..)
WRITES7DWORD(..) 1. 2. 4. 3.
Write
Read *)
Write *)
Read
Dual Port RAM
PC with WinAC Slot 41x
CPU 41x-2 PCI
STEP 7 User program
PC program
*) Data format-Conversion (S7-Data format <--> PC-Data format)

3. High-speed Data Access (1) WinAC Slot 41x, V3.2 & WinAC Slot T-Kit
Read & Write
// Data Access Helper methods - ReadS7WORD()
bool CWinAcReadData::ReadS7DWORD(long byteOffset, BIT32 &value) {
BIT16 wh;
BIT16 wl;
if (!OffsetCheck(byteOffset, sizeof(BIT32)))
return FALSE;
ReadS7WORD(byteOffset, wh);
ReadS7WORD(byteOffset+2, wl);
value = ((BIT32) wh) << 16;
value += wl;
return TRUE; }
High-speed data exchange between PC-application and WinAC Slot PLC-program

4. Technology-Interface WinAC Slot 41x, V3.2 & WinAC Slot T-Kit
Data consistency: Max. 4 Byte
Data access classes support the following data types:
BOOL
BYTE, WORD, DWORD (double word)
INT (integer), DINT (double integer, 32 Bit)
REAL (floating point)
S5TIME, TIME, DATE, TIME_OF_DAY
CHAR, STRING
PC-Side
PLC-Side
The DPR (Dual-Port RAM)-area includes each 4 KByte Inputs and 4 KByte Outputs
CPU PCI:
PIW 4096 to 8190
POW 4096 to 8190
CPU PCI
PIW to 20478
Restrictions: Only WORD- and DWORD-access on even numbers

5. Technology-Interface Examples: Read & Write (PC-Side)
bool ReadS7DWORD(long byteOffset, BIT32 &value)
This method reads a 32-Bit DWORD (double) out of the Dual-Port-RAM (Read-Area) and stores the result as 32-Bit Integer without sign into the Parameter value.
Return value:
TRUE: successful
FALSE: not successful
Parameter:
long byteOffset: Offset in Byte within Dual-Port-RAM (Read-Area)
BIT32 &value: Result; read data
bool WriteS7DWORD(long byteOffset, BIT32 &value)
This method writes a 32-Bit DWORD (double) into the Dual-Port-RAM (Write-Area) on address byteOffset.
Return value:
TRUE: successful
FALSE: not successful
Parameter:
long byteOffset: Offset in Byte within Dual-Port-RAM (Write-Area)
BIT32 &value: Value; written data

6. WinAC Slot T-Kit How to implement a Technological Application TAP
Development-Station (PC)
„Destionation“ = Runtime Station (PC)
T-Kit DLL (Library)
Header Files
Examples
Documentation
Technological application
+ T-Kit DLL
+ PLC User program
MS Visual Studio
WinAC Slot T-Kit
PC-SW
PC-Resourcen
PC HW

7. WinAC Slot T-Kit Performance - Everage Transfer-Rates (PC-program <--> DPR)
Example: (RI45, PIII)
100 Words READ 265 µsec
100 Words WRITE µsec
Improvement against „OPC-Access“: ~ Factor 15
Valuation:
„Linear behavior“ through largely independence of transfer rate from processor speed (only PCI-Bus-performance relevant)
Common timing according to applications running on PC and of total communication traffic
PLC access times analog to CPU operations and cycle times