Eaton ELCM Series, Руководство по эксплуатации

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E L C O p e r a t i o n M a n u a l
F o r m o r e i nf o r m a t i o n v i sit :
w w w. e a t o n . c o m
MN05003006E 1-92
5. Program example
Ladder diagram: Explanation:
Set CH1 to mode 4 (current
input mode)
Set the sampling range of
CH1 to 10
Store the average value of
CH1 input signals into D40
Store the present value of
CH1 input signal into D50
M1002
M1000
K0 K1 TO
D9900 D40
K0 K20 K1
K0
K1 TO
K1600
FROM
DIV
K4
K10
D50 D0
K2
K8
MOV
D50
D50/1600 = D0 (the actual
value of the present
measured current in CH1)
3.2.2 ELCM-AN02NANN / ELCM-AN04NANN
3.2.2.1 The D/A Conversion
In industrial automation, many control signals are analog signals. The most frequently used
analog signals are voltage -10V ~ 10V and current 0 ~ 20mA. Data in ELC controllers can be
converted into analog signals for controlling analog devices via analog output modules like the
ELCM-AN02NANN and the ELCM-AN04NANN.
For example, the data range -32,000 ~ 32,000 in the ELC controller is converted into -10V ~ 10V
by one of these analog output modules. The output voltage can therefore be used to control any
standard analog device.
3.2.2.2 Introduction
ELCM-AN02NANN (ELCM-AN04NANN) analog output module receives 2 (4) groups of 16-bit
digital data from the ELC and converts the digital data into 2 (4) analog output signals (voltage or
current). In addition, all data in the analog modules can be accessed via FROM/TO instructions
in the ELC controller program. Or the output values for each channel can be directly accessed by
using MOV instructions to/from special registers D9900 ~ D9999 as decribed earlier in this
document.
3.2.2.3 Specifications
„ Functional Specifications
ELCM-AN02NANN
ELCM-AN04NANN
Voltage output Current output
Power supply voltage 24 V DC (20.4 ~ 28.8V DC) (-15% ~ +20%)
Connector European standard fixed terminal block (Hole diameter: 5mm)
Analog output channel 2 channels or 4 channels
Range of analog output -10V ~ 10V 0 ~ 20mA 4mA ~ 20mA