Siemens PPI Direct Introduction

Siemens PPI Direct

Canvas supports Siemens PPI Direct as a way to connect to Siemens S7-200 series PLCs over a serial connection. Users will be able to select the Serial Port, Comm Type, Baudrate, Parity, Data Bits, Stop Bits, and Flow Control for the protocol. No additional settings will appear after selecting the device.

Memory Area and Ranges

Memory Area	Symbol	Maximum Address Range (0~)	Word Addressable	Bit Addressable	Note
Special Memory (Word)	SMW	84	✔	-
Special Memory (Bit)	SM	857	-	✔
Input (Word)	IW	14	✔	-
Input (Bit)	I	15	-	✔
Output (Word)	QW	14	✔	-
Output (Bit)	Q	15	-	✔
Internal Memory (Word)	MW	30	✔	-
Internal Memory (Bit)	M	31	-	✔
Variable Memory (Word)	VW	4094	✔	-
Counter (Word)	CW	127	✔	-	Only 16-bit tags can be used
Timer (Word)	TW	127	✔	-	Only 16-bit tags can be used
Counter (Bit)	C	127	-	✔
Timer (Bit)	T	127	-	✔

Supported Data Types

Address	bool	uint8/int8	uint16/int16	uint32/int32/float	uint64/int64/double
M	✔	-	-	-	-
MW	-	✔	✔	✔	✔
I	✔	-	-	-	-
IW	-	✔	✔	✔	✔
Q	✔	-	-	-	-
QW	-	✔	✔	✔	✔
SM	✔	-	-	-	-
SMW	-	✔	✔	✔	✔
VW	-	✔	✔	✔	✔
T	✔	-	-	-	-
TW	-	-	✔	-	-
C	✔	-	-	-	-
CW	-	-	✔	-	-

Address Format

Bit Address (bool)

• M12.3 — address number: 12, bit number: 3
• T5 — T/C: Number
• C10

Word Address (non-bool)

• MW20
• VW100
• TW5
• CW10