Multistage/Modulating Mode Via 3-Position Step Input X5-03; Maximum Possible Resolution; Modulating Mode Via Analog Input Signal X65; Standardization Of Modulation Range - Siemens LME7 Series Basic Documentation

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21.5 Multistage/modulating mode via 3-position
step input X5-03
The signal time of a control pulse is a minimum of 147 ms.
21.5.1

Maximum possible resolution

The maximum possible resolution via 3-position step input X5-03 is calculated
according to the following formula:
Working range in angular degrees x 0.147 s
---------------------------------------------------- = maximum possible resolution in angular degree
Running time in seconds
Example: Actuator, 30 seconds running time for 90°
90° x 0.147 s
------------------- = 0.441° ≈ 0.5°
30 s
21.6 Modulating mode via analog input signal
X65
21.6.1 Maximum possible resolution
The maximum possible resolution of analog input signal X65 is determined via the
connected ASZxx.3x feedback potentiometer.
For actuators having a working range of 0...90°, the resolution is about 0.5°.
For actuators having a working range of 0...135°, the resolution is about 0.8°.
21.6.2

Standardization of modulation range

In the modulation range, the analog input signal is standardized. This means that the
low-fire position corresponds to a preset output of 0% = 0 V-/0 mA-/4 mA-/0  input
signal and the high-fire position corresponds to a preset output of 100% = 10 V-/
20 mA-/135  input signal.
The modulation range in angular degrees corresponds to the angular rotation from the
low-fire to the high-fire position.
Calculation: High-fire position minus low-fire position = modulation range.
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CC1P7105en
29.11.2011