Alstom Reason RPV311, Technical Manual

Page: 191 / 350

RPV311 Chapter 9
– MODBUS
RPV311-TM-EN-6 191
2 DESCRIPTION
Status, analog and digital data are available in MODBUS registers. Access to SCADA integration is provided
over Ethernet interface. Up to 8 simultaneous connections are allowed at a maximum rate of 60 accesses
per second.
2.1 REGISTER TYPES
Each register reports 16-bit data. Registers are divided into 3 groups:
Register Type
0 Status
100 to 199 Analog data
200 to 223 Digital channels
2.2 STATUS
The equipment status is reported by the following registers:
Register Type
0 General State
Bit 0: General failure
Bit 1: Low primary power voltage
Bit 2: Not used
Bit 3: Not used
Bit 4: IRIG-B synchronization failure
Bit 5: Fault recording low memory
Bit 6: Disturbance recording low memory
Bit 7: Steady-state recording low memory
Bit 8: Sequence-of-events recording low memory
Bit 9: Internal failure