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Hardware Planning and Assembly
4.1 Planning the Hardware in SIMATIC
SIWAREX FTA is a function module (FM) in the SIMATIC S7 300 automation
system. It can be installed in all places that are constructed for function modules.
Utilisation with the SIMATIC S7 300 is possible in central operation, in an
expansion device or decentralised in the ET 200M system.
Operation in the SIMATIC S7 400 is only possible decentralised in the ET 200M
system. In this case, the active back-plane bus can be used.
In estimating the maximum number of SIWAREX FTA's that can be integrated
within one system, the following information may be helpful.
Total width
n x 80 mm
Table 4-1
Requirements for n SIWAREX FTA
The maximum amount of SIWAREX modules depends on the SIMATIC CPU
respectively the ET200M head module, see details in SIMATIC catalogue.
Selecting the suitable SIMATIC CPU, the SIMATIC HMI (Human Machine
Interface) and communication modules does not only depend on SIWAREX FTA
requirements but also on the overall job that the automation system has to perform.
4.2 Stand-alone operation
SIWAREX FTA is also ready for operation without SIMATIC. The described
hardware configuration and wiring also applies for stand-alone operation. The only
difference is that the module is not connected on the SIMATIC backplane bus and
the power supply for the module is all handled through the 24V connector on the
front.
We recommend the SIMATIC profile rail for fastening the module mechanically.
To run the module in stand-alone operation, use the instruction "12 Switch on
stand-alone operation" using the SIWATOOL FTA. The instruction is saved i.e.
after switching the power supply off and switching it on again, the module remains
in stand-alone operation.
Several particularities must be observed however:
Switching to stand-alone operation can only be done if the module is not connected
to a SIMATIC bus.
The module monitors the connections on the SIMATIC bus and if it detects that it is
running in SIMATIC, it automatically switches SIWAREX into:
4-14
Current requirements
(5V) from SIMATIC back-
plane bus
n x 50 mA
Application memory
requirements in the
SIMATIC CPU
3500 Bytes +
n x 1200 Bytes
SIWAREX FTA
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