Bender ISOMETER isoCHA425 Manual page 4

Table of contents
3.2 Installation........................................................................................................................................................16
3.3 Connection.......................................................................................................................................................16
3.4 Commissioning...............................................................................................................................................18
4 Operation.......................................................................................................... 19
4.1 Operating and display elements.............................................................................................................19
4.2 Menu overview...............................................................................................................................................21
4.3 Displaying measured values..................................................................................................................... 22
4.4 Setting the response values (AL)............................................................................................................ 23
4.4.1 Response values overview.........................................................................................................................23
4.4.2 Setting the insulation resistance parameters.....................................................................................23
4.4.3 Setting parameters for undervoltage and overvoltage..................................................................23
4.5 Configuring fault memory, alarm relays, and interfaces (out)......................................................24
4.5.1 Configuring the relays.................................................................................................................................24
4.5.2 Assigning the alarm messages to the relays...................................................................................... 24
4.5.3 Activating or deactivating fault memory.............................................................................................25
4.5.4 Configuring interface...................................................................................................................................25
4.6 Setting delay times and self test cycles (t).......................................................................................... 26
4.7 Setting device control parameters (SEt)...............................................................................................26
4.8 Reset to factory settings.............................................................................................................................27
4.9 Showing and deleting the history memory........................................................................................27
4.10 Querying software version (InF).............................................................................................................. 27
5 Data access via RS-485 interface.....................................................................28
5.1 Data access using the BMS protocol..................................................................................................... 28
5.2 Data access using the Modbus RTU protocol.................................................................................... 28
5.2.1 Reading out the Modbus register from the ISOMETER®.................................................................28
5.2.2 Writing the Modbus register (parameter setting).............................................................................29
5.2.3 Exception code...............................................................................................................................................30
5.3 Modbus register assignment.................................................................................................................... 31
5.3.1 Modbus measured value registers......................................................................................................... 31
5.3.2 Modbus parameter register...................................................................................................................... 34
5.4 IsoData data string....................................................................................................................................... 37
6 Technical data...................................................................................................39
6.1 Technical data isoCHA425......................................................................................................................... 39
6.2 Standards and certifications..................................................................................................................... 44
6.3 Ordering data..................................................................................................................................................44
6.4 Document revision history........................................................................................................................ 45
4 isoCHA425_D00352_03_M_XXEN/08.2023