Rockwell Automation 1772-LV,D17726.6.1 A and I MNL MINI-PLC-2/15 PROCESSO User Manual
Page 65
System Start-Up
Chapter 4
4Ć5
TESTING INPUTS
Hardware/indicator comparison should begin with the testing of input devices
and modules. Perform the following steps for each input device:
1.
Turn the Processor’s Mode Select Switch to the TEST position.
2.
Press [SEARCH][5][3] and enter the word address of the Input Module to
be tested. The state of each input in the selected Module Group will be
displayed in the format shown in Figure 4–2.
WARNING: Never reach into a machine to actuate a switch since
unexpected machine motion can occur and cause injury to personnel.
Do not use a metal rod since this could result in an electrical shock if
it touches an exposed terminal. Instead, use a wooden stick or other
non–conductive device to activate the switch.
3.
For each input terminal, manually turn the corresponding input device ON
and OFF. Observe the display and the corresponding Input Module
indicator to verify the correct state is indicated.
Figure 4.2
Bit Manipulation Display
Data Table Word
247 to be monitored
(or bits to be manipulated)
8
Word 247
17 16 15 14 13 12 11 10 07 06 05 04 03 02 01 00
0
0
0
1
1
1
1
1
1
0
1
1
0
0
0
1
Bit 17 of
Word 247
State:
0 = OFF
1 = ON
8
10135–I
If the Input Module indicator does not turn ON when its corresponding device is
CLOSED, either the device or its wiring is faulty. If the Input Module indicator
turns ON, but this is not indicated at the Industrial Terminal, the Input Module
is most likely malfunctioning. First try reseating the Input Module in the I/O
chassis. If it still malfunctions, replace the Module as described in Section 5.6.2.