DescriptionValue or Value range/ DefaultNameNumber of TCP connectionclose requestsTCP closeModbus Device attributes6.3.3.Table 6.3.3-1 Modbus device attributesDescriptionValue or Value range/ DefaultNameData type: IntegerAccess: No limitationsThe operational status of thedevice - in use or out of use.Taking the device out of usewith this attribute stops all datacommunication with the device.All operations that would resultin data exchange are disabled.The device itself is not affectedby the attribute, only the pro-tocol stack’s image of thedevice. Setting IU to 1 isallowed only if the deviceaddress is legal.0 = Out of use1 = In useDefault: 1In useData type: IntegerAccess: No limitationsIndicates the detailed informa-tion about the station devicestatus. Writing to the OS attrib-ute (OS = 1) of a device makesthe protocol stack to re-transmitthe last system messagecaused by the device. Possible"Stopped" and "Suspended"messages cause old markingof OPC items. By reading theOS attribute, the status code ofthe system message can beread.See the Status Codes manualfor detailed information.1 = Re-transmit system mes-sageA status code, for example:0 = OK (communication worksproperly)13801 = Device suspendedObject statusData type: BooleanAccess: Read-onlyIndicates the status of thedevice connection.True = Device connection OKFalse = Device connectionsuspendedDevice connection status1281MRS758690COM600 series 5.0Master Protocols (Ethernet) and Applications Technical Refer-ence Manual
