System Components and Technical Data
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SICAM A8000 / CP-8000 • CP-8021 • CP-8022 Manual
DC8-037-2.02, Edition 10.2017
5.5.8 MODMT2,
MODST0
5.5.8.1 Functions
Communication between one central station and up to 100 substations (MODBUS).
Central Station
•
Serial communication according to Modicon MODBUS
MODMT2 is central station
•
MODBUS protocol with half duplex link transmission procedure
─
MODBUS RTU mode
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Max. connections (number of supported MODBUS Slaves): 100
1)
─
max. number of SICAM FCMv2 devices per interface without SICAM FCMv2 parame-
ter loading: 100
─
max. number of SICAM FCMv2 devices per interface with SICAM FCMv2 parameter
loading: 5
•
Message protection
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CRC16 + parity (optional) “RTU mode“
•
Network Configurations
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Point-to-point
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Multiple point-to-point (extra interface required for each point-to-point configuration)
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Multipoint-partyline
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Multipoint-star
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Data concentrator
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MODBUS Slave address 0 “broadcast“
2)
•
MODBUS Slave addresses 1…247
•
Physical Interface
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RS-232 - unbalanced interface according V.24/V.28 standard
─
RS-485 - balanced interface according V.11 standard
3)
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RS-422 - balanced interface according V.11 standard
3)
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Transmission line (half duplex)
•
Interoperability according to the following documents:
─
SICAM RTUs MODBUS Interoperability
(DC0-073-2)
•
Acquisition of events (transmission of data ready to be sent)
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General interrogation, outstation interrogation
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Clock synchronization for selected MODBUS Slave Devices
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Clock synchronization - selectable for each MODBUS Slave
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Clock synchronization for SICAM FCM
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Optimized parameters for selected transmission facilities (modems)
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Predefined optimized parameters for selected transmission facilities
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Free definable parameters for transmission facility
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5 V power supply for external modem
ATTENTION: check power consumption of external modem!
•
Protocol element control and return information
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Protocol element return information
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Station status
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Station failure
Summary of Contents for CP-8000
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