Rockwell Automation 1747-PT1, D1747NP002 Hand-Held Terminal - Manual (Page 226)

Chapter 16
Bit Instructions
16–2
XIC Instruction
False
True
Bit Address State
0
1
Examine if Closed XIC Input Instruction
] [
F1 F2 F3 F4 F5
ZOOM on XIC –] [– 2.0.0.0.1
NAME: EXAMINE IF CLOSED
BIT ADDR: I1:1.0/0 ***************0
EDT_DAT
HHT Ladder Display:
HHT Zoom Display:
Ladder Diagrams and APS Displays:
(online monitor mode)
] [
I:1.0
0
Logic States:
Specific operation of an XIC instruction having an input data file
address: When an external input device completes its circuit, an on state is
indicated at the input terminal wired to the device. This status of the
terminal is reflected in the input data file at a particular addressed bit. With
the terminal on, the processor finds this bit set (1) during an I/O scan,
causing the XIC instruction to be true. When the input device no longer
completes its circuit, the input terminal is Off; the processor then finds the bit
reset (0) during an I/O scan, causing the XIC instruction to be false.
Examine if Closed (XIC)