Protocol Data Package Composition - elobau 485EPF series Originalbetriebsanleitung

PROTOCOL DATA PACKAGE COMPOSITION

The bus module exports the system status and the status and diagnostics elements of all I/Os configured
on the eloProg and enables 8 single field bus inputs to be imported.
The input and output memory maps are described in the tables at page 3.
The input map is made up by a single byte representing the fieldbus inputs.
The output map is made up by a status byte, a variable number of bytes for the Mosaic input status, a
byte representing the copy of the fieldbus inputs, a variable number of bytes to represent the probes
status, a variable number of bytes to represent the Mosaic OSSD status, two bytes to represent the
Mosaic diagnostics.
The system status is shown as 1 byte in which the 0 bit indicates whether the eloProg is online/offline
and bit 1 indicates the presence of diagnostics elements.
Each input and each output (OSSD) configured on the system is associated with two information
elements: status and diagnostics.
Status is a binary value, 0 or 1, diagnostics is a code indicating the condition of the I/O, which can be OK
or indicate a problem on the I/O.
Each module with inputs has a number of bits corresponding to the number of physical inputs which are
present; thus the modules 485 EPB, 485 EPE08, 485EPE08A02 are associated with 1 byte (8 bit), the
modules 485EPE16, 485EPE12 with 2 bytes (16 bit) for the inputs status.
All safety outputs are summarized in 1 or 2 bytes.
The location of the inputs varies according to the type of modules that are installed, in the following
order: 485EPB, 485EPE08A02, 485EPE16, 485EPE08, 485EPE12. If several modules of the same type
are installed the order follows the node number.
Diagnostics elements are in the form of 2 bytes which indicate the number of the I/O with the problem
and the value of the diagnostics element. If there is more than one diagnostics element, the relative
values alternate every 500 ms. Each set of information:
input status,
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input diagnostics,
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field bus input status,
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probe status,
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safety output status,
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safety output diagnostics
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can be enabled/disabled in order to control the information and thus the number of bytes exported to the
field bus. The field bus inputs are 8 independent bits through which 8 different states can be injected into
the electrical panel.
The byte that represents the 8 field bus inputs is mapped as the first PLC input byte.
For the fieldbuses in which the mapping position is mandatory (i.e. PROFIBUS DP) the input byte
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must be mapped before the output bytes.
For the fieldbuses based on CANOpen the data can be accessed only via PDO. The SDO access is
•
not supported.
eloProg 485EPF.. - Vers. 1.2
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