User Manual
Chapter 5
GFK-1503F
Jan 2020
Configuration
57
Storing a Configuration with Non-default Memory Allocation
If you reconfigure reference tables from the default sizes, storing a hardware configuration
to the PLC in the future will clear memory contents. If you want to retain memory contents,
first load reference memory contents from the PLC to the programmer. Then, re-store
reference memory when you store the hardware configuration from the programmer to the
PLC.
Default Serial Port Parameters
When a programmer is first connected, the PLC communicates using the default
communications parameters: 19,200 baud, odd parity, one start bit, one stop bit, and eight
data bits. If these parameters are re-configured, the new settings will be used at powerup
instead.
Serial Port
Configuration
Takes Effect After Removing
Programmer
If a hardware configuration is stored to the CPU, the configuration for the serial port to
which the programmer is connected is not actually installed until the programmer is
removed. After removal of the programmer, there is a delay before the new protocol begins
operating. This delay is equal to the configured T3’ time.
5.4
Autoconfiguration
When autoconfiguration is enabled and no previous autoconfiguration exists, at powerup
the CPU automatically reads the configuration of the modules installed in the system and
creates an overall system configuration. If a previous autoconfiguration is present at
powerup, the configuration is processed as described on the next page.
Modules that have software-configurable features use their default settings when
autoconfigured. These features are described in the VersaMax Modules, Power Supplies,
and Carriers Manual (GFK-1504).
At powerup, the CPU by default automatically generates a configuration that includes all of
the modules that are physically present in the system, starting at slot 1 of rack 0 (the main
rack). Autoconfiguration of a rack stops at the first empty slot or faulted module and
continues with the next rack. For example, if there are modules physically present in slots 1,
2, 3, 5, and 6, the modules in slots 5 and 6 are not autoconfigured.
To autoconfigure a system with expansion racks, either all racks must be powered from the
same source or the expansion racks must be powered up before the main rack.
Содержание PaCSystems VersaMax Series
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