Eurotherm 605 Series, Руководство по установке и инструкция к продукту

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Programming Your Application
6-9
605 Series Frequency Inverter
Functional Description
The 605 inverter has two analog inputs. There is an analog input function block for each:
ANALOG INPUT 1 is associated with the signal on terminal 2, ANALOG INPUT 2 is
associated with the signal on terminal 4.
The input voltage is pre-processed and converted into a numeric value by the analog input
electronics of the 605 inverter. The analog input function blocks further process this reading so
that a value of 0.00% represents an input equal to the low input range, while a value of 100.00%
represents an input equal to the high input range. The SCALE and OFFSET factors are then
applied as shown to produce a value suitable for use in the application.
The break detect facility may only be used in conjunction with the following hardware ranges:
2 to 10V, 1 to 5V, 4 to 20mA and 20 to 4mA. An input break is defined as an input reading less
than either 0.1V or 0.45mA. When an input break has been detected, the VALUE output is
forced to be the BREAK VALUE .
Configuration Switch Settings (SW1)
The analog input terminals are configured for voltage or current operation by the I/O
configuration switch settings. Remember to select the appropriate TYPE parameter.
Table 6-2 Select Input Signal
Figure 6-3 I/O Configuration
Switches shown at
Manufacturing Defaults
+
VALUE
SCALING OFFSET
X
INPUT
BREAK VALUE
INPUT LOSS LEVEL
BREAK ENABLE
BREAK
TYPE
UNPROCESSED
Input Input Input Input Type Type Type Type Switch Settings Switch Settings Switch Settings Switch Settings
ANALOG
INPUT
1
0-20 or 4-20mA SW1/1 OFF, SW1/2 ON
Terminal 2 0-10V* SW1/1 OFF, SW1/2 OFF*
±
10V SW1/1 ON, SW1/2 OFF
ANALOG
INPUT
2
0-20 or 4-20mA SW1/3 OFF, SW1/4 ON
Terminal 4 0-10V* SW1/3 OFF, SW1/4 OFF*
± 10V
SW1/3 ON, SW1/4 OFF
* Default settings, as shown
SW1
SW2
1
2
3
4
1
2
3
4
ON
ON
OFF
OFF