hager HR551 - Page 3

Contents
7.3.11 Individual test....................................................................................................................... 24
7.3.12 Setting the trip current and trip delay................................................................................. 25
8 Configuration..............................................................27
8.1 Communication...................................................................................................................28
8.1.1 Transmission speed............................................................................................................. 28
8.1.2 Peripheral no........................................................................................................................ 29
8.1.3 Data bits, stop bits and parity............................................................................................. 29
8.2 Time setting........................................................................................................................ 30
8.2.1 Year.......................................................................................................................................31
8.2.2 Month....................................................................................................................................31
8.2.3 Day........................................................................................................................................31
8.2.4 Hour...................................................................................................................................... 32
8.3 Pre-alarm............................................................................................................................. 32
8.3.1 Pre-alarm trip current...........................................................................................................32
8.3.2 Pre-alarm operation..............................................................................................................33
8.3.3 Pre-alarm polarity.................................................................................................................34
8.4 Trip relay............................................................................................................................. 34
8.4.1 Polarity..................................................................................................................................35
8.5 Installation........................................................................................................................... 35
8.5.1 Saving the installation.......................................................................................................... 36
9 RS-485 communication.............................................37
9.1 Connecting devices with RS-485......................................................................................37
9.2
Modbus® protocol..............................................................................................................38
9.3
Modbus® commands......................................................................................................... 38
9.3.1 Device and installation variables..........................................................................................39
9.3.2 Channel variables................................................................................................................. 40
9.3.3 Variables of the trip unit for a test or communication.........................................................41
9.3.4 Event parameters................................................................................................................. 42
9.3.5 Trigger and pre-alarm configuration variables.....................................................................42
9.3.6 RS-485..................................................................................................................................44
10 Appendix.....................................................................45
10.1 Technical data.................................................................................................................... 45
10.2 Dimensions..........................................................................................................................46
10.3 Disposal note...................................................................................................................... 48
Fehlerstromschutz-Relais 3