Project SLC500
Some of these procedures may cause damage, loss of control, or loss of data/programs if used without consulting the specific manual for the proceedure that you wish to perform! Rockwell Automation has not reviewed or authorized this page, and DOES NOT make any guarentees or warantees based on my extracts of their literature.

This page is a very condensed guide to the Allen-Bradley (A-B) SLC 5/04 1747-L54x series of processors and modules needed to accomplish MY inscrutable goals with the microchannel architecture 1784-KT2 adapter. What I want to do and components mentioned on this page may not be supported by the software and/or hardware at your location, and inclusion or exclusion of any SLC 5/04 component IMPLIES NOTHING of it's suitability for use in other applications.

WARNING! Please consult the Rockwell Automation documentation for the A-B product that you intend to use for warnings and safety hazard notifications.This A-B software and hardware may control 5vdc, 24vdc, or 120vac circuits, high speed mechanical equipment, big whoppin' mechanical stuff that might crunch you, and other things that don't take kindly to loosing control while they are in operation. For mission critical applications, you should consult with personnel qualified to service any equipment or software mentioned on this page.

I take no responsibility, expressed or implied, for your use of ANY of the information on this page. I am NOT qualified by Rockwell Automation, any other manufacturer or educational institution, to offer qualified advice on any PLC or SLC component or the operation thereof. Unless specifically noted, all information on this page  is based on my best guess, and may not be what Rockwell Automation would recommend for any specific circumstance. All images, unless marked with "LFO" in them, are the property of A-B, and may be subject to copyright laws if used for commercial purposes.


/s/ Louis F. Ohland III

Publication 1747-6.2 The SLC 500 Installation and Operations Manual
Installation Manuals

The PLC5 and SLC500 families are the ones to consider. The PLC2 and PLC3 are too ancient (pre-1985), getting the correct software is problematic.

BTW, don't confuse the PLC (5/15, 5/20, 5/40, etc) with the SLC (5/02, 5/03, 5/04, etc) families. Despite the similarity in numbers they're actually totally separate creatures, and use different programming packages to configure.

PLC5 Processors HERE
   The SLC500 (Pronounced "Slick500")are smaller, maybe about 1/4 the size as shown in the link below. Unless you already have piles of PLC5 pieces/parts to play with, I'd go with the SLC5/04 for a home project.

1747-L54x Processor Card, Front

   The standard DH-485 port has been replaced with a DH+™ port, providing high-speed SLC 5/04-to-SLC 5/04 communications and direct connection to PLC-5 controllers. Modular I/O systems can be configured with a maximum of 3 chassis (30 total slots) and from 4 I/O points to a maximum of 4096 I/O points. The available memory options are 16K, 32K, or 64K. In addition, there is an SLC 5/04P option, which is designed specifically for the Plastics Industry and contains ERC2 algorithms for Plastics Machinery Control.

Specification SLC 5/04
Cat. No. 1747-      L541 L542 L543
Memory Size (Words) 16K  32K  64K
Bit Execution (XIC) 0.37 µs

1747-L5x Processor Card LEDs



On (steady) Run mode.
Flash (running) Transferring program from RAM to memory module.
Off Mode other than Run.
Flash ( power up) Processor not configured.
Flash (running) Major error in processor chassis or memory.
On (steady) Fatal error (no communications).
Off No errors.
On (steady) Battery - low voltage, missing or not connected.
Off The battery is functional.
Flashing One or more input or output addresses forced to On or Off state but the forces have not been enabled.
On (steady) The forces have been enabled.
Off  No forces are present or enabled.
(Green / Red)
On (steady) Communications Active Bit (S:1/7) is set in System Status file and cpu is actively communicating on DH+ network.
Flashing Green Processor trying to establish communications but there are no other active nodes on  DH+ network.
Flashing Red Duplicate nodes on link with same node address.
On (steady)
Processor is transmitting on the network.
Processor is not transmitting onthe network.
On (steady)
DH-485 Mode
Communications Active Bit (S:33/4) set in System Status file, cpu is actively communicating on DH-485 network.
DH-485 Mode 
Processor trying to establish communications, but no other active nodes on DH-485 network.
Off DH-485 Mode A fatal error is present (no communications).

NOTE: If the LEDs on the SLC 5/04 turn on in a predefined sequence, the SLC 5/04 is in the process of downloading a new operating system.

   The -L54x processors include a 3-position keyswitch that lets you select a mode of operation: RUN, PROGram, and REMote. You can remove the key in each of the three positions.

WARNING!   Depending on the size of your user program, the processor can take up to 2.5 seconds to change modes when you change the position of the keyswitch from RUN to PROG or to REM. Do not use the keyswitch in place of a hardwired master control relay or an emergency-stop switch.

RUN Position
   Places the cpu in the Run mode. The cpu scans/executes the ladder program, monitors input devices, energizes output devices, and acts on enabled I/O forces. You can only change
the processor mode by changing the keyswitch position. You cannot perform online program editing.
   To change the processor mode to Run, toggle the keyswitch from PROG or REM to RUN. When the keyswitch is left in the RUN position, you cannot use a programmer/operator interface device to change the processor mode.

PROG Position
   This places the cpu in the Program mode. The processor does not scan/execute the ladder program, and the controller outputs are de-energized. You can perform online program editing. You can only change the processor mode by changing the keyswitch position.
   To change the processor mode to Program, toggle the keyswitch from REM or RUN to PROG. When the keyswitch is left in the PROG position, you cannot use a programmer/operator interface device to change the processor mode.

REM Position
   This places the processor in the Remote mode: either the REMote Run, REMote Program, or REMote Test mode. You can change the processor mode by changing the keyswitch position or by changing the mode from a programmer/operator interface device. You can perform online program editing in this position.
   To change the processor mode to REM, toggle the keyswitch from RUN or PROG to REM. When the keyswitch is in the REM position, you can use a programmer/operator interface device to change the processor mode.

1747-L54x Processor Card, Left Side

Install Memory
Apply Firmware Upgrade
Install Battery
Restore Factory Defaults

Restore Factory Defaults
NOTE: This is only recommendeded if the communication channels have been shut down due to the configuration parameters, or if you absolutely cannot establish communications with the processor.
WARNING! If you return the processor to the initial factory conditions, the user program is lost and communication configurations are returned to their default settings.

1. Remove power from the SLC 500 power supply.
2. Remove the processor from the chassis.
3. Disconnect the battery by removing the battery connector from its socket.
4. Locate the VBB and GND connections on the right side of the motherboard.
5. Place a small bladed screwdriver across the VBB and GND connections and hold for 60 seconds. This returns the processor to the initial factory conditions.

Seven Slot Chassis 1746-A7

Install 1747-M13 Memory Module
1. If processor is installed, turn off power.
2. Remove module - press retainer clips at both top and bottom and slide it out.
3. Locate connector on 1747 -L541/2/3 processor board. Place memory module onto socket or connector and press firmly in place.
4. Install the processor module into the chassis.
5. Restore power to the controller.

Memory Modules (SLC 500™ Memory Modules for Fixed and Modular Controllers)
1747-M13 64 K, Flash EPROM Memory Module for SLC 5/03, 5/04, and 5/05 Series C (or later) OS Firmware only. -M1 and -M2 are ONLY for the 5/01 and 5/02 processors.

NOTE: If you are using a 1747-M15 memory module adaptor to program a 1747-M13 memory module, you must use the Series B 1747-M15 memory module adaptor. If you use the Series A 1747-M15 memory module adaptor, you may damage the memory module.

Firmware Update

Install Battery
1747-BA Battery SANYO P/N CR14250SE
1.Remove power from SLC 500 PSU.
2.Remove processor from chassis - press retainer clips at top and bottom and slide it out.
3.Unplug battery connector and removeold battery.
4.Insert new battery into battery retaining clips and plug battery connector into the socket.
5.Insert module back into chassis.
6.Restore power to the SLC 500 power supply.

NOTE: The SLC 5/04 processor has a capacitor that provides at least 30 minutes of battery back-up while the battery is disconnected. Data in RAM is not lost if the battery is replaced within 30 minutes.

EEPROMS for the 1746BAS and BAST modules
The proms the 1746-BAS and 1746-BAST modules use are listed below.
1746-BAS proms are the 1747- M1 - M2 - M3 - M4.
a) The M1 - M3 are 8K bytes memory.
b) The M2 - M4 are 32K bytes memory.
c) The M1 - M2 are EEPROM.
d) The M3 - M4 are UVPROM.
Note: The BAS module cannot burn/program these. Requires uvprom programming equipment.

1746-BAST proms are the 1771 - DBMEM1 and 1771 - DBMEM2.
a) The 1771- DBMEM1 is 8K bytes.
b) The 1771-DBMEM2 is 32k bytes.
Note: 1747-M11 - M12 ARE NOT USEABLE with 1746-BAS or 1746-BAST modules.
> The 1747 M11 is a 32K "FLASH EPROM" for 5/03 - 5/04.
> The 1747 M12 is a 64K "FLASH EPROM" for 5/03 - 5/04.

Adapter Sockets
Adapter sockets are required when using commercial PROM programmers to program and erase memory modules. The memory module fits into the adapter socket, and then the adapter socket fits into the zero insertion force (ZIF) socket on the PROM burner.
Adapter Socket Descriptions
Cat. No. 1747-M15
Description: SLC 5/03, SLC 5/04, and SLC 5/05 Adapter Socket for 1747-M13

1746 I/O Module Overview

The 1746 I/O product line provides more than 60 modules to meet your application needs in a modular assembly—including intelligent I/O modules.

    * Digital I/O modules provide 4 through 32 I/O per module.
          o Digital I/O circuits interface to on/off sensors/actuators.
          o Ladder logic has direct access to I/O values.
          o Input modules, output modules, and combination input/output modules.
          o Ac and dc input modules.
          o Ac, dc, and relay-contact output modules.
    * Analog I/O modules provide 4 through 16 I/O per module.
          o D/A and A/D conversions interface analog signals to data-table values
          o Ladder logic has direct access to I/O values.
          o Input modules, output modules, and combination input/output modules.
          o A high level of resolution for accurate control in a broad range of analog applications.
    * Intelligent I/O modules are available to enhance your control system. These modules include a high-speed counter module, a BASIC language module, a motion control module, and communication modules. Each provides a unique easy-to-use interface between the I/O circuits (digital and/or analog) and the CPU.

Digital I/O Modules
   1746 Digital ac Input Modules
     1746-IA4   85…132V ac 4 inputsGeneral-purpose 120V ac inputs
     1746-IA8         "              8 inputs
     1746-IA16       "              16 inputs
     1746-IM4   170…265V ac 4 inputs General-purpose 220/240V ac inputs
     1746-IM8          "               8 inputs
     1746-IM16        "               16 inputs
     1746-IN16   24V ac / dc Sink (Source Load) 16 inputs V-ac or V-dc operation
   1746 Digital dc Input Modules
1746-IG16   4.5…5.5V dc Source (Sink Load)  16 inputs   •TTL input •BCD inputs
1746-IB8  10…30V dc Sink (Source Load)  8 inputs General-purpose dc inputs
1746-IB16          "                                     16 inputs
1746-IV8  10…30V dc Source (Sink Load) 8  inputs
1746-IV16           "                                   16  inputs
1746-ITV16  16 inputs  Fast response for time-critical applications
1746-ITB16  10…30V dc Sink (Source Load)   16 inputs
1746-IB32  15…30V dc Sink (Source Load)  32 inputs  General-purpose dc inputs. High-density for limited panel space
1746-IV32  15…30V dc Source (Sink Load) 32  inputs
1746-IC16  30…55V dc Sink (Source Load)   16 inputs  General-purpose 48V dc inputs
1746-IH16  90…146V dc Sink (Source Load)  16 inputs General-purpose 125V dc inputs

Analog I/O Modules 1746 Analog I/O modules do not require external power.
   1746-NI4   4 inputs (±10V dc, ±20 mA)
   1746-NI8   8 inputs (±10V dc, ±20 mA)
   1746-NI16I   16 inputs (±20 mA, 4…20 mA, 0…1 mA, or 0…20 mA)
   1746-NI16V   16 inputs (±10V dc, 1…5V dc, 0…5V dc, or 0…10V dc)
1746 Analog Output Modules
   1746-NO4I   4 outputs (0…20 mA)
   1746-NO4V   4 outputs (±10V dc)
   1746-NO8I   8 outputs (0…20 mA)
   1746-NO8V   8 outputs (±10V dc)
1746 Analog Combination Modules
   1746-NIO4V 2 inputs (±10V dc, ±20 mA), 2 outputs (±10V dc)
   1746-NIO4I 2 inputs (±10V dc, ±20 mA), 2 outputs (0-20 mA)
   1746-FIO4I (current outputs) 2 inputs (differential, 0-10V dc, 0-20 mA), 2 outputs (0-20 mA)
   1746-FIO4V (voltage outputs) 2 inputs (differential, 0-10V dc, 0-20 mA), 2 outputs (±10V dc)
1746 RTD and Thermocouple Modules
   1746-NR4 RTD/Resistance Analog Input Module
      4 inputs
                  100Ohm, 200, 500 Platinum
                  120Ohm Nickel
                  604Ohm Nickel/Iron
                  10Ohm Copper
                  150Ohm, 500, 1000, 3000 direct resistance
   1746-NR8 RTD/Resistance Analog Input Module
     8 inputs
                  100Ohm, 200, 500 Platinum
                  120Ohm Nickel
                  604Ohm Nickel/Iron
                  10Ohm Copper
                  150Ohm, 500, 1000, 3000 direct resistance
   1746-NT4 Thermocouple/mV Analog Input Module
       4 inputs
                 B, E, J, K, N, R, S, T Thermocouple and ±50 mV or ±100 mV
   1746-NT8 Thermocouple/mV Analog Input Module
       8 inputs
                 B, E, J, K, N, R, S, T Thermocouple and ±50 mV or ±100 mV
   1746-INT4 Isolated Thermocouple/mV Analog Input Module
       4 inputs
                 B, C, D, E, J, K, N, R, S, T  Thermocouple and ±50 mV or ±100 mV

Power Supply

Cat. #     Vin         5v   24v      User Amp Capacity   Inrush Amps
1746-P1    85-132 ac   2 A   0.46 A  0.2 A @ 24V dc       20 A
           47-63 Hz 
For the 1746-P1 and -P2 power supplies, use PWR OUT +24V dc and PWR OUT COM terminals to power 24V dc sensors and loads. The terminals on the 1746-P1 and -P2 provide an isolated, nonfused 200 mA, 24V dc power supply.

Bare minimum for a SLC500 project:
- 7-slot rack (or larger) P/N 1746-A7 or similar
- Power supply module, 1746-P1 or similar
- 5/04 CPU module, 1747-L541, -L542, or -L543
- I/O modules
- RSLogix500 Programming software ( NT or 9X. Was there ever a DOS version?)
- KT card
- DH+ compatible Twinaxial network cable a/k/a "Blue Hose", Belden #9463 or similar.

RSLogix 500
   The RSLogix 500 ladder logic programming package was the first PLC programming software to offer unbeatable productivity with an industryleading user interface. RSLogix 500 is compatible with programs created using Rockwell Software’s DOS-based programming packages for the
SLC 500 and MicroLogix families of processors, making program maintenance across hardware platforms convenient and easy. RSLogix 500 may be used with Windows 98®, Windows NT™ (4.0), Windows 2000, or Windows XP.

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