Logo

class snap7.logo.Logo(**kwargs: object)[source]

A snap7 Siemens Logo client.

There are two main comfort functions available: Logo.read() and Logo.write(). This function offers high-level access to the VM addresses of the Siemens Logo just use the form:

Notes

V10.3 for bit values V10 for the complete byte VW12 for a word (used for analog values) For more information see examples for Siemens Logo 7 and 8

__init__(**kwargs: object) → None[source]

Initialize Logo client.

Parameters:: **kwargs – Ignored. Kept for backwards compatibility.

connect(ip_address: str, tsap_snap7: int, tsap_logo: int, tcp_port: int = 102) → Logo[source]

Connect to a Siemens LOGO server.

Notes

Howto setup Logo communication configuration see: https://snap7.sourceforge.net/logo.html

Parameters:

ip_address – IP ip_address of server
tsap_snap7 – TSAP SNAP7 Client (e.g. 10.00 = 0x1000)
tsap_logo – TSAP Logo Server (e.g. 20.00 = 0x2000)
tcp_port – TCP port of server

Returns:

The snap7 Logo instance

read(vm_address: str) → int[source]

Reads from VM addresses of Siemens Logo.

Examples

read(“V40”) / read(“VW64”) / read(“V10.2”)

Parameters:: vm_address – of Logo memory (e.g. V30.1, VW32, V24)
Returns:: integer

write(vm_address: str, value: int) → int[source]

Writes to VM addresses of Siemens Logo.

Parameters:

vm_address – write offset
value – integer

Returns:

0 on success

Examples

>>> Logo().write("VW10", 200) or Logo().write("V10.3", 1)