750-671 [Steppercontroller]
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Configuration
WAGO-I/O-SYSTEM 750
I/O Modules
2.1.2.10.3
Configuration via Mailbox Mode
The configuration data set elements are determined by an address. This
address is yielded from the table assignment and may be greater than one byte;
in this case the byte with the lowest value will be present at the specified
address. The size of the element must also be given for unique access to an
element.
The table containing the configuration values is given in the appendix in
section 3.5, „Configuration Variables“.
The complete data set is loaded to the RAM on a download and is then saved
to the EEPROM; a module warm start is then carried out. The download is
conducted using the commands DLD_START, DLD_CONT and DLD_END.
These commands are explained in Chapter 2.1.2.9, “Table Manager”.
The writing procedure to the EEPROM is signaled by LED H.
The download is conducted by the table manager. The configuration data set is
not saved to the EEPROM until successful completion of the download. A
warm start is carried out subsequently, regardless of whether the download
was successful.
The Reset status bit is set after the warm start; this must be canceled using the
Reset_Quit control bit. Only then is the module operational again.
As an alternative to this, individual parameters can be specifically modified
while the module is in operation.
This requires the diagnostics opcodes (see Chapter 2.1.2.14, ”Advanced
Diagnostics”).
If a valid configuration data set is available in the EEPROM after power-on,
reset or a warm start of the module, this data set is loaded to the RAM; if not,
the factory default data set is loaded, i.e. the module is restored to the WAGO
as-delivered status.
2.1.2.10.4
Digital Signals and Signal Linking
The vital binary signals are addressed by central access functions. This
permits easy, external access to all bits and allows linking of the bits to one
another to be parameterized. Access to individual bits is performed using an
index 0 … 255.
A bit function is defined by the function unit that sets the bit (source) and the
function unit that reacts to this bit (target). Only the source is defined for
output bits, and only the target for control bits. Only status bits have set links
between two function units; they can, however, also be queries as output bits
for further processing. Bit for which the source is not fixed are designated as
linkable bits.
