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GRT1-CP1-L Positioning Unit Section 7-5
7-5-2 Hardware
Names and Functions of Parts
LED Indicators The indicators on the front of the Positioning Unit are shown below.
TS Indicators
The green and red TS indicators show the status of the Slice I/O Unit itself.
Refer to 2-1-3 LED Indicators for details.
I/O Indicators
The I/O indicators show the status of the counter inputs and digital I/O.
Inputs A and B from the rotary encoder share one indicator. Input Z from the
rotary encoder and the digital input (IN) also share one indicator. The shared
indicators are controlled via an exclusive-OR of the two inputs, e.g., the indi-
cator is OFF when both inputs are ON or both inputs are OFF.
The two digital outputs each have a separate indicator. The I/O Indicators are
described in the following table.
LED Indicators
Display Unit status.
Terminal
Block
DIP Switch
Sets 24-V or line-driver
interface.
Front of Unit with
Terminal Block Removed
Test Pins
Terminal Insertion
Holes
Release Buttons
Name Color Indicator
status
I/O status
A, B Yellow Lit Either input A or input B is ON and the
other input is OFF.
Not lit Inputs A and B are either both ON or
both OFF.
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