28: AS-INTERFACE MASTER COMMUNICATION28-18 « FC4A MICRO SMART USER ’S MANUAL »AS-Interface OperandsThis chapter describes AS-Interface operands, or internal relays M1300 through M1997 and data registers D1700 throughD1999, assigned in the CPU module to control and monitor the AS-Interface bus, and provides detailed description aboutinternal relays allocated to SwitchNet™ control units for use as slaves in the AS-Interface network. Also describes ASIcommands used to update AS-Interface operands in the CPU module or to control the AS-Interface master module.AS-Interface Operand Allocation NumbersThe I/O data and parameters of slaves on the AS-Interface bus, the status of the AS-Interface bus, and various list informa-tion of the slaves are allocated to the AS-Interface master module EEPROM. This information is called AS-Interfaceobjects, which can be accessed through the AS-Interface operands. The allocation is shown in the table below.*1: The time required to update the operand data. When using the AS-Interface master module, the scan time increases bya minimum of 10 ms.*2: These AS-Interface operand data can be read or written using WindLDR. For details, see page 28-30.*3: The LPS, PCD, and PP are set and downloaded to a PLC using WindLDR. For details, see page 28-32.*4: IDI (input data image), ODI (output data image)*5: The analog I/O data is updated only when an analog slave is connected to the AS-Interface bus.Processing TimeAS-Interface internal relays for digital I/O and status infor-mation, and data registers for LAS, LDS, LPF are updatedin every scan. Data registers for analog I/O operands arealso updated in every scan only when analog I/O are con-nected to the AS-Interface bus. The processing times forthese AS-Interface operands are shown in the table above.Other AS-Interface data registers are updated when anASI command is executed in the CPU module. For theprocessing times of the ASI commands, see page 28-28.MicroSmart CPU Module PrecessingTime (msec) *1Read/WriteAS-Interface Master Module EEPROM OperandUpdatedOperand Allocation No. AS-Interface ObjectAS-InterfaceInternalRelaysM1300-M1617 3.0 R *2 Digital input (IDI) *4Every scanM1620-M1937 3.0 W *2 Digital output (ODI) *4M1940-M1997 1.0 R Status informationAS-InterfaceDataRegistersD1700-D1731 5.2 R Analog input *5D1732-D1763 5.2 W Analog output *5D1764-D1767 1.0 R *2 List of active slaves (LAS)D1768-D1771 1.0 R *2 List of detected slaves (LDS)D1772-D1775 1.0 R *2 List of peripheral fault slaves (LPF)D1776-D1779 1.0 R/W *2*3 List of projected slaves (LPS)Each time ASIcommand isexecutedD1780-D1843 10.4 R *2 Configuration data image (CDI)D1844-D1907 10.4 R/W *2*3 Permanent configuration data (PCD)D1908-D1923 3.0 R *2 Parameter image (PI)D1924-D1939 3.0 R/W *2*3 Permanent parameter (PP)D1940 0.7 R/W Slave 0 ID1 codeD1941-D1945 — R/W For ASI command description —D1946-D1999 — — (reserved) —MicroSmart CPU ModuleLadderProcessingOtherProcessingAS-InterfaceProcessingConstantlyUpdated OperandsM1300-M1997ASI CommandD1941-D1945ASI CommandAS-InterfaceAS-Interface ObjectsIDI, ODIStatus InformationAnalog I/OLAS, LDS, LPFLPS, CDI, PCDPI, PPSlave 0 ID1D1776-D1940Updated OperandsD1700-D1775AS-Interface OperandsMaster Module
