Index 7: Read Back Active/Inactive Terminals And Slots; Accessing The Indexes Via Process Data - GE VersaPoint IC220PBI002 User Manual

Index 7: Read back active/inactive terminals and slots

Access: Read
Index 7 indicates which modules are active/inactive. Deactivation via the
parameter telegram (reservation of empty spaces) is also indicated here.
Index 7 is also 8 bytes in length, and uses the same format as Index 6,
shown above.
Bit = 1: Module and slot inactive
Bit = 0: Module and slot active
Empty spaces configured in the parameter telegram are logically ORed with
inactivation via index 6.
Index 8: Read/write ID Access: Read and write
Length = 2 bytes
Each Profibus NIU, PBI002, can be assigned an individual ID. This ID is
stored retentively and can be used to identify a station if it was disconnected
from the power supply. This means that several stations can be operated
alternately under the same station address in Profibus. The ID can also be
read cyclically in the process data.

Accessing the Indexes via Process Data

Access to the indexes described on the previous pages can be enabled via
Profibus-DP/V1 or by DP/V0. This means that the indexes can also be
addressed via normal process data. This example describes access via
process data.
To access indexes 6 to 8 via process data, configure the "PD-PCP x words"
terminal (x = 4, 6, .., 16) as the first terminal in the station. The data width
and address can be selected according to the options in the CPU.
The "Module ID" is used to read the individually-definable ID of the Profibus-
DP-V1 NIU (index 8). It does not have to not be configured. However, if it is
configured, it must be placed either directly after "PD-PCP x words" in the
second position, or in the first position if no "PD-PCP x words" module was
configured.
Configure the remaining modules as usual.
GFK-1911B Chapter 7 Configuration
7
7-17