Communications processors for SIMATIC S7
8.7 Communication module TIM 1531 IRC
Industrial Ethernet
System Manual, 09/2019, C79000-G8976-C242-10
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8.7 Communication module TIM 1531 IRC
Description
Figure 8-12 TIM 1531 IRC for SIMATIC S7-1500
The TIM 1531 IRC is a communication module for TeleControl applications for the SIMATIC
automation systems S7-300, S7-400 and S7-1500. The TIM is designed as an independent
device and can be used as a substation, node station or central station. It is equipped with
three Ethernet interfaces for TeleControl communication via IP-based WAN/LAN networks
and with a serial interface for communication via classic WAN networks.
By means of the TIM, SIMATIC stations can be connected via public or private
infrastructures to a TeleControl master station. In this case, one local CPU is assigned to the
TIM. As a standalone device, the TIM is not dependent on the S7 device family or rack type
of the assigned CPU.
The following protocols can be selected for TeleControl communication:
● SINAUT ST7
● IEC 60870-5-101/104
● DNP3
The TIM has its own processors and a RAM memory for buffering data frames and events.
This way data losses during a connection failure or the failure of a communication partner
are avoided. In addition, the TIM 1531 IRC provides the option of using media redundancy
over physically separate connection paths without data loss at the changeover.
Examples of a topology
Use as node station
In a node/master station with a SIMATIC S7-1500, the TIM 1531 IRC is connected to the S7-
1500 and the control center via one of its three Ethernet interfaces and can exchange data
with the lower-level stations, for example, via other Ethernet interfaces with path
redundancy.
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