1745-2.4, SLC Programmable Controllers EEPROM Memory Module
Contents
1. PRODUCT BULLETIN AB bata 1745 wy SLC Programmable Controllers EEPROM Memory Module Catalog No 1745 M1 The EEPROM The EEPROM is a non volatile memory in convenient modular form for Memory Module use with SLC 100 and SLC 150 Programmable Controllers A Series B module or a Series A module having a 28 pin chip must be used with the SLC 150 processor unit The majority of Series A modules sold in the past meet the 28 pin chip requirement Specifications ble Programmable Range ng 40 to85 C storage EEPROM Program Since EEPROM modules can be inserted in any SLC 100 or SLC 150 Identification Processor unit it is important that you identify each EEPROM with the particular program it contains and the controller or controllers it is to be used with Caution Interchanging programs between controllers could cause improper operation and equipment damage You must be especially cautious when interchanging programs between SLC 150 and SLC 100 controllers because of differences associated with certain internal addresses and other variations Publication 1745 2 4 October 1987 Supersedes Publication 1745 2 4 Dated August 1985 40065 233 01 0 2 EEPROM Memory Module Insta lling the The procedure for installing the EEPROM in the processor unit is shown EEPROM _ inthefigure below IMPORTANT Always turn off power to the processor before you insert or remove the EEPROM This guards against poss2. etentive instructions latches timers counters sequencers will be reset to their initial states You cannot edit the EEPROM program directly You must first load the program into the processor RAM if it is not already inthe RAM You then edit the RAM program and store the edited program in the EEPROM For example suppose an EEPROM is installed and its contents are loaded in the RAM You can change the program in the EEPROM as follows 1 The RAM program is a duplicate of the EEPROM program edit the RAM program 2 Press MODE 6 ENTER ENTER 3 The edited program is now in the EEPROM and in the RAM Error code E52 tells you that the processor RAM program does not match the EEPROM program Ifan EEPROM is installed in the processor unit this error will appear after you edit your program and attempt to enter the Run or Test modes This reminds you that you should load the edited program in the EEPROM before going into the Run mode Error code E52 can be overridden by pressing ENTER again Note Error code E52 is not displayed when on line data changes are made to the processor RAM NI ALLEN BRADLEY my A ROCKWELL INTERNATIONAL COMPANY Industrial Control Group Milwaukee Wisconsin 53204
3. form step 2 2 Disconnect power from the processor Insert the memory module Restore power 3 Press ENTER ENTER After a brief time the display will momentarily show donE Any program previously stored in the memory module will be erased 4 You can now disconnect power and remove the memory module replace cover or you can leave the module in place The processor operates from the RAM only Caution It is important to enter mode 6 before installing the memory module Reason Ifthe processor were in the Run mode when you disconnect power insert the memory module and restore power step 2 your program could be automatically erased and replaced with the contents of the memory module Refer to auto load procedure on the following page Loading the EEPROM into The following steps show you how to use the pocket programmer to load the Processor RAM read the contents of the EEPROM memory module into the processor RAM If you know that the processor is in the Run mode you may be able to use the auto load procedure described on Page 4 Ifthe processor is in some other mode follow these steps 1 Disconnect power from the processor Insert the memory module Restore power 2 Connect the programmer Press MODE 7 ENTER ENTER Ifan access code is stored in the EEPROM you will be requested to enter the code after you press ENTER the second time 3 Duplication of the EEPROM contents in the RAM occurs almost instantaneousl
4. ible damage to the EEPROM and also avoids undesired CPU faults Memory module socket Remove this cover SLC 150 processor unit EEPROM socket cover on SLC 100 processor unit is similarly located INSTALLATION PROCEDURE 4 Turn off power to the processor unit To insert the memory module remove the cover from the front of the Processor unit Save the cover for use later Align the memory module socket with the reteptade inside the Processor unit Push carefully to seat the module R Rest e e power to the processor Stor ing and Loadin g Thefollowing paragraphs explain how to use the pocket programmer to Procedures store a processor RAM program in the EEPROM and to load an EEPROM program in the processor RAM If you are using the personal computer software refer to the SLC Personal Computer Software User s Manual Pub 1745 825 for further information on these procedures 3 EEPROM Memory Module Storing a Program in the The following steps show you how to use the pocket programmer to store Memory Module save the contents of the processor RAM in the EEPROM memory module If you are using an access code it will be stored in the EEPROM We ll assume that the memory module is not plugged in 1 Connect the programmer Press MODE 6 ENTER Display will show SurE Note You could press ENTER a second time altho it isn t necessary Error code E51 will appear you can ignore the error code and per
5. ve Has access code gt Has no access codeor No You must use access code does not programmer match code in processor Has access code _ Has same access _Hasnoaccesscode Mayormaynothave _ G access code Programmable Auto Load SLC 150 Processor Unit Editing EEPROM Programs Changes not Saved in EEPROM Error Code E52 5 EEPROM Memory Module With the SLC 150 processor unit you can use address 864 in your program to automatically load the EEPROM program in the processor AM when the processor detects a memory checksum error Such errors are detected if memory data is altered or lost due to capacitor back up drain battery back up drain or processor malfunction It works like this 1 Enter the following unconditional rung as Rung 1 of your program 864 T eee 2 Enter the rest of your program and store the program in the EEPROM This is your back up program 3 Ifa memory problem occurs and the processor unit detects a memory error codes 5 thru 8 recycle power The EEPROM program will be automatically loaded in the processor RAM clearing the error An error 6 message will be displayed by the pocket programmer following an auto load error This error message can be cleared by using the Cancel key on the pocket programmer or re entering the Run Mon Test mode via SLC personal computer software Important Keep in mind that when the auto load occurs the I O table data is cleared All r
6. y The previous program in the RAM is automatically erased 4 You can now disconnect power and remove the memory module replace cover or you can leave the module in place The processor operates from the RAM only Auto Load Procedure 4 EEPROM Memory Module If you are using an SLC 100 processor unit The auto load procedure will load the contents of an EEPROM into the processor RAM without the use of the programmer The only exception Ifthe EEPROM has an access code you must use the programmer It doesn t matter whether the processor has the same code as the EEPROM a different code or no code Follow these steps 1 The processor must be in the Run mode initially 2 If the processor is energized disconnect power Insert the EEPROM Caution To avoid automatically entering the Run mode when you restore power set the Auto Man switch to Man at this time 3 Restore power The EEPROM contents is automatically duplicated in the RAM The previous program in the RAM is automatically erased 4 When you are certain it is safe to enter the Run mode set the Auto Man switch to Auto If you are using an SLC 150 processor unit In this case you can enter an access code in the processor RAM to protect the stored program against unauthorized EEPROM loading The table below indicates the conditions under which the auto load procedure will and will not function Ifthe auto load is functional follow steps 1 4 in the paragraph abo
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