Analog Inputs 2-15
Value Display
Parameters are available in the Monitoring Group to view the actual value
of an analog input regardless of its use in the application. Whether it is a
current limit adjustment, speed reference or trim function, the incoming
value can be read via these parameters.
The value displayed includes the input value plus any factory hardware
calibration value, but does not include scaling information programmed by
the user (i.e. [Analog In 1 Hi/Lo]). The units displayed are determined by
the associated configuration bit (Volts or mA)
Cable Selection
Important points to remember:
• Always use copper wire.
• Wire with an insulation rating of 600V or greater is recommended.
• Control and signal wires should be separated from power wires by at
least 0.3 meters (1 foot).
Important:I/O terminals labeled “–” or “Common”
are not referenced to
ground and are designed to greatly reduce common mode
interference. Grounding these terminals can cause signal noise.
Table 2.A Recommended Signal Wire
Metering
016
017
[Analog In1 Value]
[Analog In2 Value]
Value of the signal at the analog inputs.
Default:
Min/Max:
Display:
Read Only
0.000/20.000 mA
–/+10.000V
0.001 mA or 0.001 Volt
!
ATTENTION: Configuring an analog input for 0-20mA operation
and driving it from a voltage source could cause component dam-
age. Verify proper configuration prior to applying input signals.
!
ATTENTION: Hazard of personal injury or equipment damage
exists when using bipolar input sources. Noise and drift in sensitive
input circuits can cause unpredictable changes in motor speed and
direction. Use speed command parameters to help reduce input
source sensitivity.
Signal
Type Wire Type(s) Description
Minimum
Insulation Rating
Standard
Analog I/O
Belden 8760/9460(or equiv.) 0.750 mm
2
(18AWG), twisted
pair, 100% shield with drain
(1)
.
(1)
If the wires are short and contained within a cabinet which has no sensitive circuits, the use of shielded wire
may not be necessary, but is always recommended.
300V,
60 degrees C
(140 degrees F)
Belden 8770(or equiv.) 0.750 mm
2
(18AWG), 3 cond.,
shielded for remote pot only.
Encoder/
Pulse I/O
Less than or equal to30 m (98ft.)
– Belden 9730 (or equiv.)
0.196 mm
2
(24AWG),
individually shielded.
Greater than 30 m (98 ft.) –
Belden 9773(or equiv.)
0.750 mm
2
(18AWG), twisted
pair, shielded.
EMC
Compliance
Refer to
EMC Instructions on page 2-37 for details.
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