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Funk-Electronic Piciorgros GmbH
RTU-810
V2.30 - Page 107 of 126
6
Accessing the local I/O
6.1
Control and Measurement I/O (RTU Functionality)
(Note: in the following paragraph Ports A, B, C, & D are not to be confused with IP
ports mentioned elsewhere in this document).
The RTU-810 includes control and measurement inputs and outputs integrated with the
modem. The basic version (RTU-810/DA2)has 16 on-off inputs (Ports A and B) and 8
on-off outputs (Port C). A further optional version has Port D, which can be ordered as
8 additional on-off outputs, or as 4 analog inputs.
Each of the 16 on-off inputs of Port A have independent event counting functions that
can be enabled by the user. Port A inputs counters operate as event counters, while Port
B counters operate as time-totalizing counters. The maximum counting rate [input pulse
rate] is 10 Hz.
The control and measurement I/O can be accessed using any of the following protocols:
MoP / MoP2: This is the Piciorgros radio protocol which is used to access the
RTU-810 from a serial master device, OPC-server, MDP-310.200 and in Point-
to-(Multi)point links with a RTU-810 master
MODBUS/IP and -RTU through the serial interface or Ethernet interface.
MODBUS-RTU via the radio network with a serial master in ZZTR mode
IEC-60870-5-101 (unbalanced): through the serial interface or over the radio
network using a ZZTR serial master. (Future option)
IEC-60870-5-104 through Ethernet interface or over the radio network (Future
option)
DNP3 through Ethernet interface or over the radio network (Future option)
The protocols IEC-60870-5-104 and DNP3 do support unsolicited messages. In this
case the RTU-810 will actively inform the SCADA master if any input value has
changed. This saves a lot of traffic compared to polling protocols like MODBUS which
require continuous data transfer to get up-to-data values from the field.