4 RCMS410_D00424_00_M_XXEN / 09.2022
4 Interfaces .......................................................................................... 19
4.1 Digital inputs and outputs (overview) ...............................................................19
4.2 Output M+.................................................................................................................... 20
4.2.1 Digital mode ...............................................................................................................20
4.2.2 Analogue mode ......................................................................................................... 21
4.3 Digital input and output Q....................................................................................22
4.4 Digital input I ..............................................................................................................25
4.5 Inputs CT1…4..............................................................................................................26
4.5.1 Measuring-current-transformer connection ...................................................26
4.5.2 Connection of CTs of other manufacturers......................................................27
4.5.3 CT1…4 as digital input ...........................................................................................28
4.6 RS-485 interface..........................................................................................................28
5 Operation and settings on the device ........................................ 29
5.1 RCMS410 control panel (overview) ....................................................................29
5.2 STATUS LED.................................................................................................................. 29
5.3 ALARM LEDs.................................................................................................................30
5.4 CHANNEL-INDICATION LEDs..................................................................................30
5.5 T/R BUTTON..................................................................................................................30
5.5.1 "RESET" Function .......................................................................................................31
5.5.2 "TEST" function............................................................................................................ 31
5.5.3 "NFC" Function............................................................................................................ 31
5.5.4 "ADDR" function .........................................................................................................31
5.5.5. Harmonic analysis......................................................................................................32
6 Modbus interface............................................................................ 33
6.1 Overview........................................................................................................................33
6.2 Read and write permissions...................................................................................33
6.3 Data types.....................................................................................................................33
6.4 Register areas...............................................................................................................33
6.5 Device-information registers.................................................................................34
6.5 Alarm/measuring-value registers.........................................................................35
6.6 Monitoring-functions registers.............................................................................37
6.7 Status-information registers ..................................................................................37
6.8 Harmonic-analysis registers ...................................................................................38
6.9 THD, RMS registers, H1…400 ................................................................................ 42
6.10 Modbus-parameter registers................................................................................. 43
6.11 Registers of digital input "I"....................................................................................43
6.12 Registers of input/output "Q"................................................................................44
6.13 Registers of output "M+"......................................................................................... 45
6.14 Registers of response-value parameters ........................................................... 46
6.15 Function and operating-characteristics registers ..........................................47
6.16 Alarm-behaviour registers......................................................................................48
