MODBUS Monitored data - Arc protection - Auto synchronization - Bay control and measurement - Merging unit - Transformer protection - 2 winding - Feeder protection - Voltage regulation - Capacitor bank protection - Petersen Coil control - Grid automation - Busbar differential protection (high impedance) - Back-up protection - Motor protection - Busbar protection (voltage and frequency) - Transformer protection - 3 winding - Interconnection protection - Generator protection - Power management/Load shedding - Modbus Communication Manual - REX640 Protection and control - Relion Protection and Control - PCL4 - IEC - ANSI - 06.07.2021

REX640 Modbus Communication Protocol Manual

Table 1. Monitored data
Name Type Values (Range) Unit Description
Customization Mode Enum

0=Off/Normal

1=By Parameter

2=By File

Protocol Customization Mode
Reset counters BOOLEAN

0=False

1=True

Reset counters
Received frames INT32 -1...2147483646 Number of received frames
Transmitted frames INT32 -1...2147483646 Number of transmitted frames
Transmitted exc A INT32 -1...2147483646 Number of transmitted exception responses 01 and 02
Transmitted exc B INT32 -1...2147483646 Number of transmitted exception responses 03
Checksum errors INT32 -1...2147483646 Number of checksum errors
CnReject no sockets INT32 -1...2147483646 Number of rejected connections due to no sockets available
CnReject unregistered INT32 -1...2147483646 Connection rejected due to unregistered client