
5-9
Installing Remote Base Controllers—RBCs
SIMATIC 545/555/575 System Manual
The base containing the Series 505 CPU and local I/O is designated base 0.
You can connect up to 15 remote bases to your Series 505 system, numbered
1 through 15. If you are using more than one RBC, each RBC must be
uniquely numbered. (Figure 5-7 shows the location of the base number
switch on the front of the RBC models.)
• A thumbwheel switch on the –A version RBC is used to assign the base
number.
• A rotary switch on the –B version RBC is used to assign the base
number. Base numbers 10 through 15 are represented by the
hexadecimal characters A through F. (See Figure 5-7.)
To change the RBC base number, you adjust the switch setting to the
desired number. If the system is operating when you change the setting, the
RBC will be reset. The new base number takes effect when the RBC
completes reset.
NOTE: Do not select base 0 on an RBC. Base 0 is reserved as the local base.
!
WARNING
If you reset the RBC when the system is operating, the RBC is logged off the
system. When the RBC is logged off, inputs and outputs associated with the
base are affected, as described below. If you do not take the condition of your
inputs and outputs into account, logging the RBC off the system can cause
unpredictable process operation.
Unpredictable process operation can cause death or serious injury to
personnel, and/or damage to equipment.
Do not reset your RBC unless you understand and are prepared for the
consequences (see “Resetting the RBC” on page 5-11).
If you want to use the base number switch to reset the RBC while the
system is operating, momentarily change the switch to another number,
then quickly return it to the correct base address setting.
Series 505 Base
Numbers
Changing the RBC
Base Number
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