Technology functions
3.1 High-speed counters
CPU 1512C-1 PN (6ES7512-1CK01-0AB0)
Manual, 12/2017, A5E40898741-AA
45
The measuring functions have the following measuring range limits:
Table 3- 2 Overview of low and high measuring range limits
Low measuring range limit
High measuring range limit
Period measurement 2.5 μs * 25 s
Velocity measurement Depending on the configured number of "increments per unit" and the "timebase
for velocity measurement"
* Applies to 24 V incremental encoder and "quadruple" signal evaluation
All measured values are returned as signed values. The sign indicates whether the count
value increased or decreased during the relevant time period. For example, a value of -
80 Hz means that the count value decreases at 80 Hz.
For more information on measuring, refer to the S7-1500, ET 200MP, ET 200SP Counting,
measurement and position detection function manual
(http://support.automation.siemens.com/WW/view/en/59709820).
Position detection for motion control
You can use the digital on-board I/O, e.g. with an incremental encoder, for position detection
with S7-1500 Motion Control. The position input is based on the counting function, which
evaluates the acquired encoder signals and provides them for S7-1500 Motion Control.
In the hardware configuration of the CPU 1512C-1 PN in STEP 7 (TIA Portal), select the
"Position input for Motion Control" mode.
For a detailed description of the use of motion control and its configuration, refer to the S7-
1500 Motion Control function manual
(http://support.automation.siemens.com/WW/view/en/109749262). In the function module,
the interface between the drives and encoders is referred to as a technology module (TM). In
this context, a technology module (TM) also refers to the digital on-board I/O of the compact
CPU described here.
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