Allen-Bradley MicroLogix 1400 User Manual

Publication 1766-RM001A-EN-P - October 2008
Process Control Instruction 359
– type: 0 for CO%
2. Enter the REM RUN mode and verify that PV=0.
3. Type: 20 in CO%
4. Record the PV = _______
5. Type: 40 in CO%.
6. Record the PV = _______
7. Type: 60 in CO%.
8. Record the PV = _______
9. Type: 80 in CO%.
10. Record the PV = _______
11. The values you recorded should be offset from CO% by the same
amount. This proves the linearity of your process. The following
example shows an offset progression of fifteen.
– CO 20% = PV 35%
– CO 40% = PV 55%
– CO 60% = PV 75%
– CO 80% = PV 95%
If the values you recorded are not offset by the same amount:
• Either your scaling is incorrect, or
• the process is not linear, or
• your equipment is not properly connected and/or configured.
Make the necessary corrections and repeat steps 2-10.
Determining the Initial Loop Update Time
To determine the approximate loop update time that should be used for
your process, perform the following:
1. Place the normal application values in MinS and MaxS.
2. Type: 50 in CO%.
3. Type: 60 in CO% and immediately start your stopwatch.
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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