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Glossary
Counted value
A counted value (for example amount of flow) is acquired over a digital input as a pulse train
and totaled to produce a binary-coded value. A counted value is 2 words: 28 bits for the
binary-coded value 4 display bits.
CP
Communications processor
CPU
(Central Processing Unit)
The CPU handles the central sequential control and coordination of all activities of the
module.
CSD
(Circuit Switched Data)
Service in GSM for wireless transmission of data at 9600 bps full duplex. Connections can
be established to other GSM devices, to analog modems or to ISDN modems in the fixed
network. The connection establishment can be started at both ends. Only dial-up
connections are supported.
Data messages
The actual transmission of data takes the form of data messages. These contain a fixed
amount of a specific information type.
There are status messages, analog value messages, counted value messages, command
messages, setpoint messages, parameter messages and data messages for the various
information types.
DCF77 radio clock
DCF77 is a time signal transmitted on the normal frequency 77.5 kHz as encoded time
information. Reception of the time signal is restricted to Western Europe.
Some TIM variants (TIM 4VD, TIM 42D, TIM 43D, TIM 44D, TIM 4RD) are equipped with a
DCF77 receiver module that can receive the DCF77 time signal either over an indoor or
outdoor antenna. The ST7 time management currently requires the existence of a DCF77
time signal to allow time synchronization of the stations and the control center throughout a
network.
For applications that cannot receive the DCF77 time signal, SINAUT provides a GPS
receiver module with a GPS outdoor antenna that converts the GPS Time signal for the
DCF77 receiver module.
Ethernet / Industrial Ethernet
Industrial Ethernet is a powerful communication network complying with the international
standard IEEE802.3 (Ethernet) that was optimized to meet the requirements of industrial
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SINAUT ST7 Station control system - System Manual
System Manual, 05/2007, C79000-G8976-C178-06
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