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5-17

Installing Remote Base Controllers—RBCs

SIMATIC 545/555/575 System Manual

Switches 1 through 3 on the dipswitch control the baud rate of the

RS-232/423 port. Table 5-6 lists the baud rates available.

Invalid selections cause the RBC to report an error on the Status Display

and cause the RS-232/423 port to default to 9600 baud.

The RS-232/423 baud rate switch settings are read only on power-up or

after pressing the reset button.

NOTE: The RS-232 port is disabled by default. To enable the port, change

the default parameter of the module in COM PROFIBUS. (See Table 5-9.)

Table 5-6 RS-232 Port Baud Rate Settings

Baud Rate Switch 1 Switch 2 Switch 3

38400 0 0 1

19200 1 1 1

9600 1 1 0

2400 1 0 0

1200 0 1 0

300 0 0 0

INVALID 0 1 1

INVALID 1 0 1

Switches 4 through 10 on the dipswitch are used to assign a station address

to the RBC for identification in the PROFIBUS-DP I/O channel. Each

station in the PROFIBUS-DP I/O channel must be uniquely numbered. The

station address is assigned as a binary number, with SW10 as the Least

Significant Bit (LSB). Table 5-7 shows how to set the dipswitch to a station

address between 0 and 125 (the valid range of station addresses).

The station address switch settings are read only on powerup or after

pressing the reset button.

WARNING

Pressing the RESET button when the system is operating causes the RBC to be

logged off the system and may change the output states of the output modules

in the base. Logging the RBC off the system or changing output states

inadvertently can cause unpredictable process operation.

Unpredictable process operation can result in death or serious injury to

personnel, and/or damage to equipment.

Do not push the reset button unless you intend to log the RBC off the system.

Baud Rate for the

RS-232 Port

Assigning the RBC

Station Address

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