Allen-Bradley MicroLogix 1400 User Manual

Publication 1766-RM001A-EN-P - October 2008
548 MicroLogix 1400 Memory Usage and Instruction Execution Time
MicroLogix 1400 Indirect Addressing
The following sections describe how indirect addressing affects the
execution time of instructions in the MicroLogix 1400 processor. The
timing for an indirect address is affected by the form of the indirect
address.
For the address forms in the following table, you can interchange the
following file types:
• Input (I) and Output (O)
Sequencer Compare SQC 3.1762 0.8505 2.00 3.2480 0.9823 None
Sequencer Load SQL 2.7700 1.1741 1.57 2.8680 1.2800 None
Sequencer Output SQO 3.6105 0.9480 2.00 3.1920 1.1850 None
Square Root SQR 54.8140 0.3561 1.14 45.1450 0.3732 None
Selectable Timed Interrupt
Start
STS 20.8470 0.2125 0.71 None None None
Subtract SUB 1.8426 0.3767 1.57 1.7651 0.3758 None
Suspend SUS None None None None None None
Service Communications SVC 39.8260 (CH0)
5.9042 (CH1)
36.5800
(CH0 & CH1)
0.1933 (CH0)
0.1857 (CH1)
0.1774
(CH0 & CH1)
1.86 None None None
Swap SWP 1.0728 0.1963 1.14 None None None
Tangent TAN 122.6760 0.3915 1.14 126.9135 0.4234 None
Compute Time Difference TDF 5.9770 0.2219 1.57 7.2150 0.2035 None
Temporary End TND 0.3320 0.2100 0.14 None None None
Convert to BCD TOD 5.9198 0.3916 0.71 None None None
Off-Delay Timer TOF 0.5203 1.0962 (DN=0)
0.5322 (DN=1)
0.71 None None None
On-Delay Timer TON 2.0338 (DN=0)
1.2608 (DN=1)
0.8608 (DN=0) 0.71 None None None
User Interrupt Disable UID 2.7470 0.1859 0.71 None None None
User Interrupt Enable UIE 3.4226 0.1968 0.71 None None None
User Interrupt Flush UIF 2.7930 0.1847 0.71 None None None
Examine if Closed XIC 0.2646 0.2512 0.71 None None None
Examine if Open XIO 0.2513 0.2775 0.71 None None None
Exclusive Or XOR 4.9480 0.3671 1.57 4.8454 0.3646 None
X Power Y XPY 66.2050 0.3920 1.57 69.0550 0.3548 None
MicroLogix 1400 Controllers -
Memory Usage and Instruction Execution Time for Programming Instructions
Programming Instruction Instruction
Mnemonic
Word Long Word
Execution Time in µs Memory
Usage in
Words
Execution Time in µs Memory
Usage in
Words
True False True False
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Allen-Bradley MicroLogix 1400 Specifications

General

Processor	32-bit
Expansion Modules	Up to 7 expansion I/O modules
Power Supply	24V DC or 120/240V AC
Programming Software	RSLogix 500
Communication Ports	Ethernet, RS-232/RS-485 combo port
Controller Type	Programmable Logic Controller (PLC)
Series	MicroLogix
Digital Outputs	12
Analog Inputs	6 (embedded)
Analog Outputs	2 (embedded)
High-Speed Counter	6 high-speed counters
Pulse Output	2 (embedded)
Ethernet Port	Yes