Hitachi SJ-PB(T) Profibus Configuration, Setting, Node Address, Baudrate, PPO-typeselection

CHAPTER 4 SETTING

4.1 Profibus Configuration

Follow the procedure below to set Baud rate in Profibus-DP and Node Address, reset the power supply after changing the setting (setting will be reflected after resetting power supply). Initial Node Address: 0, Initial Baud rate: According to master’s setting.

4.1.1 Node Address

Before power-on the SJ300/L300P the node address has to be set. This is done with the two rotary switches(Figure 1-1) on the SJ-PB(T); this enables address settings from 0-99 in decimal format. The right rotary switch at the top of the option board represents a times ten factor. The rotary switch at the left represents one to nine. For example, if address 27 shall be set: Set the right rotary switch to two and the left rotary switch to seven.

Address = (Right Switch Setting x 10) + (Left Switch Setting x 1)

(Note) The node address cannot be changed during operation; the module needs to be re-powered in order for the change to have effect.

4.1.2 Baudrate

The baudrate on a Profibus-DP network is set during configuration of the master and only one baudrate is possible in a Profibus-DP installation. The SJ-PB(T) has an auto baudrate detection function and the user does not have to configure the baudrate on the module. Refer to 4-1 for the baudrates supported.

Table 4-1 Supported baudrates

Baudrates supported by SJ-PB(T)

9.6kbit/s 19.2 kbit/s

45.45kbit/s

93.75kbit/s

187.5kbit/s 500 kbit/s 1.5 Mbit/s 3 Mbit/s 6 Mbit/s 12 Mbit/s

4.1.3 PPO-type selection

The SJ-PB(T) supports PPO-type 1-5. (Refer to chapter 5.1 for PPO description)

The PPO type is configured from the master. The SJ-PB(T) senses the configuration and configures itself accordingly. The amount of input/output data transferred on the Profibus network depends on the selected PPO type. Amount of data transferred in the data-exchange telegram is ranging from 4 bytes input/output (PPO3) to 28 bytes input/output (PPO5).

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