9 Appendix9.1 GlossaryRS-485 Interface standard for digital, line-bound and differential serial data transmis-sion. (1)Modbus The Modbus protocol is a communication protocol based on a master/slaveor client/server architecture. In the version for serial interfaces such as RS-232or RS-485 the data are transferred in ASCII mode or RTU mode. In the versionfor TCP, the data is transmitted similar to the RTU mode. (1)ASCII Representation of data in human readable characters.RTU Remote terminal unit, remote control terminal. Representation of binary datain machine-readable form only.AD-PC Serial data connection of the manufacturer Adamczewski elektronische Messtech-nik GmbH from the device to the programming adapter VarioPass.Sources:(1) Wikipedia9.2 MaintenanceDuring proper operation of the AD-MM 400 , this is maintenance-free. The devicemay only be repaired by the manufacturer in case of damage.9.3 MalfunctionIf an error or a fault occurs, try to find the cause first. If the error persists, pleasecontact the manufacturer or dealer of the device, which can be found in chapter 9.5.9.4 RevisionsRevision Date Remarks1.1 2016-07-27 added images1.0 2015-10 Document created29