Siemens SIMATIC ET 200SP Manual page 63

Configuring/address space
4.4 Fast Mode
4.4.4 Explanation of parameters
Potential group
A potential group consists of a group of directly adjacent I/O modules within an ET 200SP
station that are supplied from a common supply voltage.
A potential group begins with a light BaseUnit, which feeds the required supply voltage for all
modules of the potential group. The light BaseUnit interrupts the three self-configuring
voltage bars P1, P2 and AUX to the neighboring modules on the left.
All other I/O modules of this potential group are plugged into dark BaseUnits. They take on
the potentials of the self-configuring busbars P1, P2 and AUX from the neighboring modules
on the left.
A potential group ends with the dark BaseUnit, which is followed by a light BaseUnit or
server module in the station configuration.
Signal type
You can select from the following signal types:
Signal type
Incremental encoder (A, B phase-
shifted)
Incremental encoder (A, B, N)
Pulse (A) and direction (B)
Pulse (A)
Count up (A), count down (B)
Invert direction
You can invert the counting direction to adapt it to the process.
The inverting of the direction is configurable and active for the following signal types:
● Incremental encoder (A, B phase-shifted)
● Incremental encoder (A, B, N)
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Meaning
An incremental encoder with phase-shifted A and B signals is
connected.
An incremental encoder with phase-shifted signals A and B
and a zero signal N is connected.
A pulse encoder (signal A) with direction signal (signal B) is
connected.
A pulse encoder (signal A) without direction signal is con-
nected.
Signals for counting up (signal A) and down (signal B) are
connected.
TM Count 1x24V (6ES7138‑6AA01‑0BA0) technology module
Manual, 07/2019, A5E33002339-AD