Measuring Modes; Overview Of Measuring Modes - Siemens SIMATIC S7-300 FM 350-1 Manual

Operating Modes, parameters and commands

7.4 Measuring modes

7.4 Measuring modes
7.4.1

Overview of measuring modes

Overview
You define FM 350-1 functionality by setting a default mode of operation. The table shows
an overview of measuring modes.
Table 7- 29
Name
Frequency measurement
Speed measurement
Period measurement
These operating modes are enabled by programming FM 350-1.
134
Measuring modes supported by FM 350-1
Description
FM 350-1 counts the pulses received within a dynamic measuring
time.
FM 350-1 counts pulses received from a tacho generator within a
dynamic measuring time, and calculates the velocity based on this
value and the number of pulses per encoder revolution.
FM 350-1 indicates the dynamic measuring time as a period. If the
period is less than the update time, then an average is calculated
for the period.
FM 350-1 Counter module
Manual, 05/2011, A5E03648639-01