Input Modes - Burkert 8640 Operating Instructions Manual

Input modes

NOTE With the input modes, the input (repeaters) in the process map ot the input (PMI) may be
allocated in different ways. The choice of modes is made in the parameter telegram (see
Chapter PROFIBUS DP).
Normal mode
In the normal mode, all inputs are read in from right to left.
Input module (e.g. 16 inputs)
Power supply earth
Power supply +24 V
Inputs
Fig:: Normal mode
„Shifted Inputs" mode
In the „Shifted Inputs" mode, the first 16 inputs are alternately set in the transfer protocol in Byte 0 and
Byte 1. With the next 16 inputs, the same takes place for Byte 2 and Byte 3.
Input module (e.g. 16 inputs)
Power supply earth
Power supply +24 V
Inputs
Fig: „Shifted Inputs" mode
„Halved Inputs" mode
In the „Halved Inputs" mode, every second input is missed out. Only inputs 1, 3, 5, ... are transferred; as a
result, only 2 Bytes are needed for 32 physically-present inputs.
Input module (e.g. 16 inputs)
Power supply earth
Power supply +24 V
Inputs
Fig: „Halved Inputs" mode
Input filter:
With the input filter, disturbances are suppressed that affect the input modules. It is hence recommended
to always activate this input filter.
ATTENTION!
With the filter active, only signals with a duration of
In order to comply with the guidelines of the EMC Act, the input filter must be activated.
F M
IELD BUS ODULE
Input module (e.g. 16 inputs)
Power supply earth
Power supply +24 V
Inputs
Input module (e.g. 16 inputs)
Power supply earth
Power supply +24 V
Inputs
Input module (e.g. 16 inputs)
Power supply earth
Power supply +24 V
Inputs
2 ms will be recognised.
PROFIBUS DP / V1
Extension module input
Transfer protocol inputs (0 to 3)
Extension module input
Transfer protocol inputs (0 to 3)
Extension module input
Transfer protocol inputs (0 to 3)
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