SLC-500 Error Codes. ADDRESS CLASS. DESCRIPTION. FIXED. 5/01 HHT users: If the processor faults for error rung 4 is executed, fault code 0016H.

Our SLC-5/03 CPU module has a problem and can't function properly. Every other time, after power cycling the Fault light will be steady or blinking. When it is steady the CPU won't do anything even talk to PC, when it's blinking, It's blinking with DH485 light together, so it will only aloud download program either.

FLT — This is the Fault Indicator. If the Fault indicator is solid red, this usually indicates a hardware problem. Flashing red indicates a 

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9/30 · You can reset the Allen-Bradley SLC-500 by shorting the VBB to the Ground. Basically these are the steps. 2) Pull out the CPU from the backpanel. 3) flip the CPU card on the back and look for VBB and GND on the CPU. VBB and Ground is as shown below. 4) Use a short wire or a screw driver to short GND and the lead marked as VBB. This resets the CPU.

2 If the outputs turn off when the PLC faults, hook an output up to a double throw relay, and connect the lamp to an NC contact. Have the PLC program turn the output on all the time. If the outputs remain in the "last state", then connect a PLC output to a timing relay which can be configured as follows.

3/12 · Troubleshooting Tutorial: Common SLC 500 Faults – Part 1 I. Introduction Programmable Logic Controllers (PLC) such as Allen-Bradley’s SLC 500 Modular or Fixed style

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5/17 · AB SLC 5/01 CPU Fault light blinking LIVE PLC Questions And Answers This board is for PLC Related Q&A ONLY. Please DON'T use it for advertising, etc. Try our online PLC

Identifying SLC 5/01 and SLC 5/02 Processor Errors . . . . . . . . 10-4 Starting Up Your Control System Maintaining Your Control System Troubleshooting. Table of Contents vii Publication 1747-6.2 Identifying SLC 5/02 Processor Communication Errors . . . . . . . 10-9

Allen-Bradley 1747-L511 SLC 500 SLC 5/01 CPU Processor, 1K Memory, DH 485 Communications. Maximum User Memory: 1K instructions; Maximum Number of I/O: 960; Maximum Local Analog I/O: 480; Program Scan Time/Kword: 4.8 ms (typical); I/O Scan Time: 1.6 ms (typical); Maximum Number of Local I/O Chassis: 3; Maximum Number of I/O Module Slots in the