Siemens SIMATIC S5-115U, Руководство пользователя

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S5-115U Manual Analog Value Processing
Startup Procedures
460 Analog Input Module:
Connect the transducer directly to the front connector on the AI 460 (Terminals: MO+, MO -).
The transducer supplies values between 0 and 20 mA, 0 mA corresponding to a liquid level of
0.00 meters and 20 mA to the maximum liquid level, which is 10.00 meters.
Plug a±20 mA range card (6ES5 498-1AA41) into the AI 460.
A digital value between 0 and 2048 units, which is subsequently processed by the application
program, is then present at the output of the analog input modules's internal ADC (see
Figure 10-32).
Figure 10-32. Function of the 460 Analog Input Module
A
D
M0
+
M0 -
±20 mA
range card
0 to
20 mA
Trans-
ducer
AI 460
CPU
Differen-
tial
pressure
Set the mode selectors at the rear of the module as follows (Figure 10-33):
Figure 10-33. Setting Mode Selectors I and II
1 2 3 4 5 6
Cyclic
sampling
50 Hz system frequency
No wirebreak signal
1 2 3 4 5 6
No reference junction
compensation
500 mV/... mA
Abs. value and
sign
Switch I Switch II
EWA 4NEB 811 6130-02b
10-65