V-RTU2000 Series
Chapter 2 - System Overview
Veesta - Remote Terminal Unit
Technical Specification Manual
Page 19 of 90
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2.2.3 Communication Function
The communication function of V-RTU2000 Series can be divided
into Internal Communication and External Communication.
Internal Communication
: Means pointing to the inside
communication between CPU Card and I/O Cards, which is
linking with RS-485 interface, and using the Backplane
connecting card without additional wires.
External Communication
: Providing RS-232 or RS-485 two
communication channels, supporting the multi-communication
protocol to communication with external side. The supporting
protocols are listed as below:
1.
SCADA Master
: DNP3.0, IEC870-5-101.
2.
RTU Sub-Master
: ModBus RTU, DNP3.0, IEC870-5.
3.
IED
: ModBus RTU, DNP3.0.
4.
User Specific Protocols
: Other protocols can be implement
quickly in the firmware of V-RTU2000 Series by upon request.
2.2.4 Self-Diagnostic Function
V-RTU2000 Series has its well-equipped ability for self-diagnostic
function. Every abnormal status of RTU is recorded down as System
Event, or indicated by LED excitation on the panel. The System
Event Record can be retrieval by Test Set and store in its hard disk,
which very easy to find the fault portion in maintenance.
2.2.5 Programmable Algorithm Function
The V-RTU2000 Series have the capability of user definable
“Sequential Algorithm” running in it. The “Sequential Algorithm” within
a RTU operates on and can communicate through a common
variable data base which consists of analog inputs, digital inputs,
accumulator inputs, pseudo points, alarm (system) status, digital
output, and system clock.
The V-RTU2000 Series “Sequential Algorithm” programming is
based on the ladder diagram (V-RTU2000 Ladder). The circuit is
constructed of familiar contacts and coils on the rugs of the ladder.
Pages of circuit make it easy to find your way through a program.
The “V-RTU2000 Ladder Development Package“ running in IBM
compatible Personal Computer (PC) can provide the environment for
Sequential Algorithm Development. For detail information about “V-
RTU2000 Ladder“ please refer to “V-RTU2000 Ladder “ manual.
