Ceiec Electric Technology
9
1.3.2 Multiple Modbus TCP Masters Support
The PMC-1304-3 supports multiple Modbus TCP Master simultaneously to facilitate information
sharing while minimizing the implementation cost. For highly data or communication intensive
applications. The RTU Model is recommended.
Notes for RTU Moles:
64 Slave IEDs per RS-485 port or a maximum of 256 Slave IEDs per device
16 Modbus Masters per device
Figure 1-2 One PMC-1304-3 Serving 3 Modbus Masters Simultaneous
1.3.3 Data Logging
The RTU Model supports embedded Modbus RTU mastering as well as Local Data Caching and Data
Logging of real-time parameters from Slave IEDs for a maximum of 25,600 data points. The device
can be configured to perform data logging from 1-minute to 60-minute intervals. With its large
on-board non-volatile Log Memory, the device is capable of storing interval. These features enhance
the overall system performance and reliability, reduce the CPU loading of the Head-End applications
such as EMS, BMS or SCADA and provide an extra level of data redundancy for IEDs without any
on-board memory.
