Bit Strobe Instruction/Response - Toshiba 2000 V Series Manual

(2) Polling Response
As a slave device receives a polling instruction, it transmits an arbitrary size of
response data to the master device.
Response data varies depending on the specifications of the slave device.
The method of reading polling response data from the DN611 by the S controller is
explained in the text dealing with communication with slave devices in Chapter 5.
1.4.2

Bit strobe instruction/response

Bit strobe instruction/response is used to exchange a small size of data between the
master device and slave devices.
With a bit strobe instruction, the master device broadcasts 1-bit output data to all the
slave devices on the basis of its scan list information.
The individual slave devices transmit data (of 0 to 8 bytes) in response to the bit strobe
instruction to the master device. (Bit strobe response). It depends on the specifications
of a slave device how it interprets a bit strobe instruction and what data it transmits as the
bit strobe response.
The slave device must be compatible with the bit strobe instruction/response function in
order for this communication function to be valid.
(1) Bit Strobe Instruction
Data is broadcast to the slave devices on the network that are compatible with the bit
strobe instruction/response function.
The bit strobe instruction contains 64-bit output data, and 1-bit output data is
assigned to each node address on the network (Figure 1-9).
In the example shown in Figure 1-9, the DN611 inputs sensor information using the
bit strobe function and is about to send output control data to the actuator.
The way of transferring bit strobe output data from the S controller to the DN611 is
explained in the text dealing with communication with slave devices in Chapter 5.
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1.4 Basic Functions
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