Acyclic Data Transmissio - Siemens 7ME30 Instruction Manual

Instruction Manual
Example:
The measured values sound velocity, temperature and ultrasonic amplitude are to be transmitted. The
following identifier combination should set:
1. Free Place (for flow)
2. short Identifier or long Identifier (for sound velocity)
3. Free Place (for net quantity)
4. short Identifier or long Identifier (for temperature)
5. short Identifier or long Identifier (for ultrasonic amplitude)
An identifier is not required for the forward quantity and reverse quantity as the ultrasonic amplitude is the
last value to be transmitted.
Output data can only be transmitted and therefore the totalizer reset if the corresponding "extended
Identifier" (long) is used. The first byte of the output data always refers to the first resettable totalizer.
If, for example, the "Resettable quantity forw. (long)" and "Resettable quantity rev. (long)" identifiers for the
forward and reverse quantity are set but the "Resettable quantity net (long)" identifier is not set for the net
quantity, i.e. the net quantity totalizer is the only one which cannot be reset, the first byte of the output data
will refer to the totalizer for the quantity forward.
4.1.2 Acyclic Data Transmission
The acyclic data transmission is mainly used for remote control of devices, i.e. for transmitting parameters
during commissioning, maintenance, batch processes or for displaying further variables which do not take
part in the acyclic input and output data transmission.
Acyclic accesses can be carried out by Master class 1 (C1 connection) or Master class 2 (C2 connection).
Sitrans F supports up to 4 simultaneous C2 connections.
The approximately 400 parameters including address (slot and index), format, range of values, start value
and attributes are compiled in an object list "Obj8091.rtf" which is available on request.
We recommend using the SIMATIC PDM software package and a PC (compatible with industry standard)
or a programming unit with the following minimum specifications should preferably be used for acyclic
operation:
Hardware:
80486 processor or higher
D
At least 32 MB RAM
D
Hard drive with at least 70 MB free space
D
Monitor: VGA standard or MS Windows compatible
D
Keyboard and mouse (optional)
D
CD-ROM drive
D
CP5411 A2, CP5511 or CP5611 interface
D
Software:
Windows 95 or Windows NT
D
SIMATIC PDM V5.01 or higher (SIMATIC STEP 7 OEM included)
D
Integrated Help functions support use of SIMATIC PDM.
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SITRANS F with PROFIBUS PA
C79000-B5676-C114-03