![]() Temperature this takes the whole array where Temperature takes the first word only NetH these are configured in blocks as you require them for example plc1 could use W000 to W0f0 & B000 to B00ff other station would use W0100 to W01ff etc.Īll user memory areas can be used just like M or D even if these are not used by comms it depends if you use GX Developer or GX Works on how you set the variables in the symbols, GX Dev only needs the first word for float as it automatically takes the second, in Works a Real or float is 32 bits so takes up D20 + D21Īrrays are as many words as required for example array 0.3 of byte is 4 bytes that's 2 words Dx to DX+1 array 0.3 of word takes up 4 words Dx to Dx+3 when you address an array you either use just the symbol i.e. Link relays are used for comms, W words & B bits are very often used for network comms i.e. Latch relays or bits are the Data memory & M bits these can be set to retentive, in the project tree go to plc parameters and one of the last tabs are parameters there you can set the areas that retain data when plc in stop or powered down, on FX D200-255 are usually retentive by default but you can change this from D000 to Dxxx this applies to various other memory areas.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |