Vortice VORT NRG EC 3000 Bedienungs- Und Inbetriebnahmeanleitung Seite 45

ENGLISH
Introduction
Corrigo E ventilation is a pre-programmed application for control of an air handling unit (CTA). The Corrigo E controller
can be used either stand-alone or integrated in a EXO system. In both cases, it is configured via the display or by using
the configuration tool E tool on a PC. This document describes all signals that are accessible via EXOline or Modbus. It
does not describe how to create an EXO system.
Signal types
All signals accessible from a SCADA system are described in this document. Signals with a default value are settings that
can be changed via a SCADA system. Signals without a default value are actual values which cannot be changed using
a SCADA system.
EXOL type
EXOL type signals:
R = Real number with decimal digit (Real) (-3.3E3S - 3.3E38)
I = Integer number (Integer) (-32768 - 32767)
X = Index (0 - 255)
L = Boolean (Logic) (0/1)
Modbus type
Modbus type signals:
1 = Coil Status Register (Modbus function = 1.5 and 15)
2 = Coil Status Register (Modbus function = 2 and 15)
3 = Holding Register (Modbus function = 3, 6 and 16)
4 = Input Register (Modbus function = 4)
Supported Modbus functions :
1 = Read Coils
2 = Read Discrete Input
3 = Read Holding Register
4 = Read Input Register
5 = Write Single Coil
6 = Write Single Register
15= Write Multiple Colls
16= Write Multiple Registers
Max. 47 registers
A maximum of 47 registers can be read in one message.
Communication limitations
The Modbus master must wait for a minimum of 3.5 character times (4 ms at 9600 bps) between two messages. When
the Modbus master is communicating with multiple Corrigo E controllers on the same communication line (RS485), it must
wait at least 14 character times (16 ms at 9,600 bps) between the answer and the first query to the next controller.
The CORRIGO E controller has a limit of 10 rapid communications every 30 seconds, while the other communications
have an answer delay of about 1 second.
Modbus Scale factor
Real number (decimal) signals have scale factor 10, except for the time setting signals which have scale factor 100, and
air flow signals which have scale factor 1 for Modbus communication. Integer, Index and Logic signals always have scale
factor 1.
Modbus activation
The Corrigo controller uses the same port for Modbus communication and EXOline communication. If communication
with a device activated through Modbus is tried using the E tool or another type of EXOline communication, the port is
automatically adjusted in about one second. The port remains in EXO mode until the line is idle for 10 seconds, then it
returns to the Modbus mode.
Modbus connection
The Modbus protocol consists of several layers (OSI-model). The bottom layer is always the physical layer and includes
the number of wires and signal layers. The next layer describes the communication digits (number of data bits, stop bits,
parity bits, etc). Then there are the layers describing the Modbus-specific functions (number of digits per message,
meaning of different messages, etc.).
For Modbus, the bottom layer can be RS485, RS422 or RS232.
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