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Saia-Burgess Controls AG

Manual Manual PCD 1 / PCD 2 Series │ Document 26 / 737 EN22 │ 2013-11-26

CPUs and expansion housings

3-36

Expansion of user memory

ExtensionmemoryisconguredandisusedtoholdRAMtextsandRAMDBs.

Step1:Hardwareconguration

Inthisexample,only112KbytesofFlashEPROMareavailableascode/textmemory

(ontheplug-inchip);oneblockofmemoryislosttocongurationdata(header),

because Flash EPROM can only be accessed in block mode.

For a PCD2.M110/M120 with hardware version < J, only 24 Kbytes of extension

memory(onboardmemory)canbecongured;previously,lessbasememorywas

provided with these CPU types.

Step2:Downloadingthehardwareconguration

Step 3: Modifying system settings

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SBC PCD1 Series Specifications

General