Perle Systems DS1 UDP Unicast Example, Digital/Relay Data, Serial Pin Signal Data, Length Data

I/O UDP

Digital/Relay Data

The digital data is in bit format, 1 meaning On and 0 (zero) meaning Off. Each channel has its own bit, in least significant bit order.

Length	*Data	Data (1 Byte, one bit for each channel)
	Exists
2 Bytes	1 Byte		Channel4	Channel3	Channel 2	Channel 1
	(in bits)

Serial Pin Signal Data

The serial data is in bit format, 1 meaning On and 0 (zero) meaning Off. Each channel has its own bit, in the following order.

Length	*Data	Data (1 Byte for each port, one bit for each signal)
	Exists
2 Bytes	1 Byte		RTS	DTR	CTS	DCD	DSR
	(in bits)

*Data Exits Field

The Data Exists field is 1 byte in least significant bit order, for each channel. If data exists for a channel, the bit will be 1, if no data exists for a channel (it is not configured), the bit will be 0 (zero).

Data Exists(1 Byte, one bit for each channel)

Channel4

Channel3

Channel 2 Channel 1

UDP Unicast Example

For an example of the I/O UDP unicast, see the sample program, ioudpbcast.c, found on your CD-ROM.

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