Allen-Bradley MicroLogix 1200 Reference Manual page 126

7-2 Relay-Type (Bit) Instructions
Publication 1762-RM001C-EN-P
expansion I/O, or internal addresses (data or function files). Examples of
devices that turn on or off:
• a push button wired to an input (addressed as I1:0/4)
• an output wired to a pilot light (addressed as O0:0/2)
• a timer controlling a light (addressed as T4:3/DN)
• a bit in the bit file (addressed as B3/16)
The instructions operate as follows:
Table 7.2 XIO and XIC Instruction Operation
Rung State Addressed
Bit
True Off
True On
False --
Addressing Modes and File Types can be used as shown in the following
table:
Table 7.3 XIC and XIO Instructions Valid Addressing Modes and File Types
For definitions of the terms used in this table see Using the Instruction Descriptions on page4-2.
Data Files
Parameter
Operand Bit • • • • • •
(1) DAT files are valid for the MicroLogix 1500 only. PTO and PWM files are only recommended for use with MicroLogix
1200 and 1500 BXB units.
(2) The Data Log Status file can only be used by the MicroLogix 1500 1764-LRP Processor.
(3) See Important note about indirect addressing.
You cannot use indirect addressing with: S, ST, MG, PD, RTC,
IMPORTANT
HSC, PTO, PWM, STI, EII, BHI, MMI, DAT, TPI, CS, IOS, and
DLS files.
XIC Instruction
Returns a False
Returns a True
Instruction is not evaluated
(1)
Function Files
• • • • • • • • • • • • • •
XIO Instruction
Returns a True
Returns a False
Instruction is not evaluated
Address
Address
(3)
Level
Mode
• • •