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Fieldbus Controller 750-841 • 71Data ExchangeWAGO-I/O-SYSTEM 750ETHERNET TCP/IPOverview of the IEC 61131-3 address ranges:Address range MODBUSAccessSPSAccessDescriptionphys. Inputs read read Physical Inputs (%IW0 ... %IW255 and%IW512 ... %IW1275)phys. Outputs read/write read/write Physical Outputs (%QW0 ... %QW255 and%QW512 ... %QW1275)MODBUS/TCPPFC IN variablesread/write read Volatile SPS Input variables (%IW256 ... %IW511)MODBUS/TCPPFC OUT variablesread read/write Volatile SPS Output variables (%QW256 ... %QW511)Ethernet/IPPFC IN variables- read Volatile SPS Input variables (%IW1276 ... %IW1531)Ethernet/IPPFC OUT variables- read/write Volatile SPS Output variables (%QW1276 ... %QW1531)Configuration register read/write --- see Chapter „Ethernet“Firmware register read --- see Chapter „Ethernet“Flags/RETAINvariablesread/write read/write Remanent memory (%MW0 ... %MW12288)Table 3.7: Overview IEC 61131-3 Address ranges3.1.6.2.3 Absolute AddressesAccessing individual memory cells (absolute addresses) in accordance withIEC 61131-3 is made using special character defined in the table below:Position Character Designation Comments1 % Starts absolute address2 I InputQ OutputM Flag3 X* Single bit Data widthB Byte (8 Bits)W Word (16 Bits)D Double word (32 Bits)4 Addresse. g. word wise: %QW27 (28. Word), bit wise: %IX1.9 (10. Bit in Word 2)* The character ‘X’ for bits can be deletedTable 3.8: Absolute AddressesNoteEnter the absolute address character strings without blanks (white spaces)! |
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