Fig. 179: SICAM mounting rack
System architecture
The SICAM RTU is a modular system. It is suitable for substation sizes from approxi- mately 300 up to 2048 data points. The SICAM RTU consists of the:
■SICAM S7-400 basic rack with its exten- sion facilities and
■Any S7-400 CPU (412 to 477, with/with- out PROFIBUS connection). As standard CPU, the CPU 412 or CPU 413 is used. To supplement the SIMATIC S7-400 mod- ules, telecontrol-specific modules have been developed in order to fulfill the re- quired properties and functions, such as for example electric insulation strength and time resolution.
These are the following modules: ■Power supply
– Voltage range from 19 V–72 V DC – 88 V–288 V AC/DC
■Process input and output modules – Digital input DI (32 inputs) for status
indications, counting pulses, bit pat- terns and transformer tap settings • voltage ranges:
24–60 V DC 110–125 V DC
– Analog input AI (32 analog inputs grouped, 16 AIR (analog inputs iso- lated) for currents (0.5 mA–24 mA) and voltages (0.5 V–10 V) – Command output (32 CO) for
commands and digital setpoints • voltage range: 24 –125 V DC – Command release (8 DI, 8 DO) for
local inputs and outputs and monitor- ing of command output circuits • voltage ranges:
24–60 V DC 110–125 V DC ■ Communication module
– Telecontrol processor TP1 for commu- nication with the system control cen- ter with protocols IEC 60870-5-101 and SINAUT 8-FW and as time signal receivers for DCF77 or GPS reception. The Power Supply and the I/O modules can also be used in SICAM SAS.
1
2
3
4
5
6
7
8
9
10
SICAM RTU – Design
Construction
The SICAM RTU is based on the SIMATIC S7-400. The construction of the SICAM RTU is therefore, as is the case with SIMATIC, highly compact, straightforward and simple to operate:
■All connections are accessible from the front. Therefore, no swivel frame is nec- essary.
■The modules are enclosed and therefore extremely rugged.
■Plugging and unplugging of modules is possible while in operation; therefore maintenance work can be carried out in a minimum of time (reduced MTTR). ■Direct process connection is effected by
means of self-coding front plug connec- tors of screw-in or crimp design. ■During configuration, no module slot
rules have to be observed; the SICAM RTU permits free module fitting. ■No forms of setting are necessary on
the modules; replacement can be carried out in a minimum of time.
Dependent on configuration level and cus- tomer requirements, there are two housing variants:
■a floor-mounting cabinet and ■a wall-mounting cabinet.
Both housing variants are optimized for the SICAM RTU; they are of flexible modular construction. Thus, for example, provision is made for installation of accessories to provide a cost-effective rack system.
1
2
3
4
5
6
7
8
9
10
SICAM RTU – Design
SICAM Modules
SICAM RTU modules have been developed to be SIMATIC-compatible and can there- fore be used in a standard SIMATIC S7-400, for example for the following applications: ■Acquisition of status indications with a
resolution of 1 ms and an accuracy of ± 2 ms
■Time synchronization of the SIMATIC CPU to within an accuracy of ± 2 ms ■An analog input module with 32 channels
with current or voltage inputs
■Use of modules with 2.5 kV electric insu- lation strength in order to save interpos- ing relays
The modules are used for example in hydro- power plants for acquisition of fault events via digital input with a resolution of 1 ms and relaying them to a power station sys- tem, for example via an Industrial Ethernet. The other application is the use of the com- munication module TP1 in a SIMATIC NET - IEC 60 870-5-101 gateway. Fig. 182 shows an example of a PROFIBUS gateway.
Fig. 181: SICAM module
SICAM RTU IEC 60 870-5-101 SINAUT 8-FW PROFIBUS Industrial Ethernet IEDs Profibus Gateway
1
2
3
4
5
6
7
8
9
10
SICAM RTU – Functions
SICAM RTU functions
SICAM RTU possesses telecontrol func- tions, such as:
■Alarm acquisition and processing, includ- ing:
– Single point information – Double point information – Bit patterns
– Transformer taps – Metering pulses
■Measured value acquisition and process- ing, including:
– parameterizable current inputs in ranges from
0.5 mA–24 mA
– parameterizable voltage inputs in ranges from 0.5 V – 10 V
■Fail-safe command output, including: – Single commands
– Double commands – Bit pattern outputs
– Transformer tap change control – Pulse commands
– Continuous commands
■Telecontrol communication with a maxi- mum of two system control centers with different telecontrol messages, with the standardized IEC 60 870-5-101 and/or with the worldwide proven SINAUT 8-FW protocol.
In addition to the standard RTU functions, the SICAM RTU provides additional func- tions, such as:
■Efficient operation mode control with 15 priorities and various send lists, such as:
– Spontaneous lists with/without time – Scan lists for measured values, me-
tered values or status indications – Cyclic lists
– Time-controlled lists
With the aid of this mode control system, it is possible to optimize the data flow be- tween remote terminal unit and system control center.
■Time synchronization via DCF or GPS re- ceiver on the TP1 module.
The SIMATIC CPU is synchronized to within an accuracy of 1 ms.
■Serial interface to a maximum of two control centers.
In addition to selection of the telecontrol protocols IEC 60 870-5-101 and SINAUT 8-FW, the scope of status indications, measured values and commands per control center per interface can be con- figured, with separate telecontrol proto- cols, different process data, different message addresses and different modes. ■Can be extended up to 4096 information
points
■Comprehensive remote diagnostic facili- ties locally or in remote form with the aid of the SIMATIC TeleService.
■Output of analog setpoints via the S7-400 AO module (1500 kV insulated) ■SICAM RTU is maintenance-free and
requires no fan cooling
■The variety of available module types with wide-range inputs is kept to a mini- mum; the value ranges are parameterizble.
Fig. 183: plusTOOLS for SICAM RTU, hardware configuration
Engineering
The SICAM RTU is designed such that all telecontrol functions are parameterizable. Comprehensive Help texts assist the oper- ator during configuration. The following configuration steps are carried out with the aid of the intuitive-operation program plus- TOOLS for SICAM RTU:
■Creation of hardware configuration, SIMATIC modules and SICAM modules ■Setting of module parameters on the
SIMATIC modules and SICAM modules ■Assignment of process data to the mes-
sage addresses
■Assignment of message addresses to the message lists in the mode control system, stipulation of send priorities. ■Checking of all parameters for plausibil-
ity.
■Loading of parameters into a non-volatile flash EPROM of the CPU.
Fig. 183 shows as an example the mask for hardware configuration.
1. Select a module from the Hardware Catalog and 2. Drag it to the desired module location –