PFSK130 3BSE002616R1 ABB Imported electrical products of CPU processor module

Description

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General remark:
If the free (unscreened) cable length exceeds 0.1 m (4 in.) the individual pairs of power and
signal conductors must be twisted.
Free length exceeding 0.1 m can cause unstable zero point or incorrect absolute measurement
value.
Table 6-1. Fault Symptoms and Measures
Fault symptom Measures
Noisy signals – Check that cable shields are connected to earth
according to cable diagram.
– Proximity to noisy cables can cause interference
problems.
Unstable zero point – Check that cable screens are not connected in
both ends.
– Check that cable between load cell and electronic
has diagonal pairs, one pair for signal circuit and
one par for excitation circuit, see Figure 2-2.
– Check, if a junction box is installed, that load cell
signal and load cell excitation between junction
box and electronics are routed in separate cables.
– Check, if two or more IP 20 units are mounted
close to each other in the same cabinet, that they
are synchronized (cable for synchronizing the
units, see cable diagram and Section 2.4.1.3
Synchronization).
Display and LED indictors are
not illuminated
If the Operator panel display is not illuminated and
the “Power” and “Status” indications on the
Operator Panel are “OFF”, check the following:
– Check that the cables are correctly connected to
the electronics power supply.
– Check that the power supply connected to the
electronics is correct.
– Check that the power switch is “ON” (inside the
IP 65-version (NEMA 4) enclosure).
– Further tests are described in Section 6.8.1.3
Supply Error

No signal when load is applied 1. Check that cables to the electronics are
correctly connected.
2. Check that the load cells are connected with
correct polarity. If not, the load cell signals cancel
out each other. This is displayed on the operator
panel as described below:
a. The sum signal (A+B) is low
b. The difference signal (A-B) is high
c. The output signal of the individual load cells
have opposite signs (polarity) when a force is
applied on the middle of the roll.
To check load cell signal polarity, see Section 3.9
Checking Load Cell Signal Polarity
For connecting the load cells to give positive
signals for increased web tension, see cable
diagram for the installed load cell type.
3. Switch off the tension electronics and measure
the cable resistance in the load cell signal circuit
between terminals X1:5 and X1:6 and between
X1:9 and X1:10.
a. The resistance is > 25 ohm:
Check cabling and load cells.
b. The resistance is < 25 ohm:
Check the mechanics.