Siemens Industry Online Support
Siemens AG
Entry type: Product note Entry ID: 109755374, Entry date: 03/20/2018

Sales and delivery release TIM 1531 IRC V1.1 and TD7onCPU V3.0

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The new firmware V1.1 for the product TIM 1531 IRC (6GK7543-1MX00-0XE0) is hereby released for delivery. The TIM 1531 IRC is used as stand-alone device and handles the data transmission via the Siemens telecontrol protocol SINAUT ST7.

The firmware is now available for download free of charge.

The module is scheduled for delivery beginning April 2018 with the new firmware, which hereby has unrestricted delivery release.

The block library TD7onCPU V3.0 for S7-1500 and S7-300/S7-400 is hereby released and is now available for download free of charge.


The product TIM 1531 IRC can only be configured as a component of the SIMATIC S7-1500 system with STEP 7 Professional (TIA Portal) as of V14 SP1.

To use the new functions, the product TIM 1531 IRC must be configured with TIA Portal V15 Update 1.


Firmware version V1.1 

Firmware V1.1 contains new functions and product improvements concerning general operation of the module in the S7-1500 system. Upgrading via a free firmware update therefore generally makes sense and is recommended.

New functions

  • PG routing for TIM 1531 IRC.

  • TD7onCPU V3.0 for S7-1500 with TIM 1531 IRC. Refer to the information in the manual.

  • Proxy function in SINAUT engineering software for connection configuration in STEP 7 V5.6 with import of connection information into STEP 7 Professional V15 (TIA Portal). Also read the  information in the release of SINAUT Engineering Software V5.5 + SP3 (109755375) as well as the system manual Industrial Remote Communication – TeleControl SINAUT ST7 – Software Volume 2 (configuration under STEP 7 V5).


Third-party software – license conditions and copyright information 

You can find the copyright notes on the third-party software, especially open source software, as well as applicable license conditions for this type of third-party software in the ReadMe file. 

Special note for resellers 

The information and the license conditions in the readme file  must be passed on to the purchasing party to avoid license infringements by the reseller or purchasing party. 

  OSS_TIM1531IRC_99.pdf (5.7 MB)

  OSS_TIM1531IRC-TI_76.pdf (318.2 KB) 


You can download the files here.

1. Firmware update V1.1 for TIM 1531 IRC

 Download unterliegt Exportcontrolle  6GK7_543-1MX00-0XE0_V01.01.10_OSS.zip (22.6 MB) 


2. Block library TD7onCPU for S7-1500 with TIM 1531 IRC.

 Download unterliegt Exportcontrolle  Telecontrol_ST7_V3_0.exe (7.9 MB) 


Note: Software is subject to export restrictions, download only for registered users


Security information
This version contains security-related improvements which improve ruggedness. An update is recommended.
Correction of ssa-110922: Vulnerabilities in TIM 1531 IRC




Security information
In order to protect technical infrastructures, systems, machines and networks against cyber threats, it is necessary to implement – and continuously maintain – a holistic, state-of-the-art IT security concept. Siemens’ products and solutions constitute one element of such a concept. For more information about cyber security, please visit
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