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

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18.5 Multistage / modulating mode via 3-
position step input X5-03
The signal time of a control pulse is a minimum of 147 ms.
18.5.1

Maximum possible resolution

The maximum possible resolution via 3-position step input X5-03 is calculated accord-
ing 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
18.6

Modulating mode via analog input signal

X65
18.6.1 Maximum possible resolution
The maximum possible resolution of analog input signal X65 is determined via the con-
nected 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°.
18.6.2

Standardization of modulation range

In the modulation range, the analog input signal is standardizes. This means that the
low-fire position corresponds to a preset output of 0 % = 0 V- / 0 mA- / 4 mA- / 0 Ω input
signal and the high-fire position corresponds to a preset output of 100 % = 10 V- /
20 mA- / 135 Ω input signal.
The modulation range in angular degrees corresponds to the angular rotation from the
low-fire position to the high-fire position.
Calculation: High-fire position minus low-fire position = Modulation range
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CC1P7105en
13.10.2009