Starting An Nv-Series Pt; Starting The Pt For The First Time - Omron NV Series Setup Manual

Starting an NV-series PT

4-6

Starting an NV-series PT

4-6-1

Starting the PT for the First Time

Precautions for Correct Operation
Depending on the operating environment, grounding may actually cause prob-
lems.
Example: The power supply line for the PT is connected to a functional ground
through electronic components. If there is abnormal electric potential between
the power supply line and the ground, the electronic components may be dam-
aged.
24 VDC
0 V
Functional ground
• With the NV3W, do not ground the functional ground terminal on the PT if
the positive (+) terminal of the 24-V power supply on the PT is grounded.
Depending on the model of the personal computer, the 24-V power supply
may be short-circuited and the PT may be damaged. This is because,
depending on the model of the personal computer connecting to PT, the
SG terminal of the RS-232C port may be connected to the exterior of the
connector. In addition, there is no isolation between the exterior of the NV
tool port and the functional ground. They are connected. Therefore, when
you connect a personal computer, you have in essence connected the NV
GND terminal to the functional ground terminal. When the positive side of
the 24-V power supply to the PT is grounded, grounding the functional
ground terminal will cause short-circuiting and damage as shown below.
Power
supply
24 V
+
GND
0 V
Functional
ground
Ground
Ground
Make sure that hardware connections are correct before turning ON the
power supply and starting the PT. This section describes the initial operation
of the PT.
The following screen will be displayed when the PT is turned ON for the first time.
Transfer the base screen data from the NV-Designer.
PT Power Supply Line
NV3W
SG Cable
Exterior Exterior
Do not ground the functional ground.
Section 4-6
Personal
computer
SG
77