Select State | B&B Electronics 485DSS manual

in the address field specifies all 485DSS's on the network. This command temporarily turns off (disconnect) the RS-232 port from the network while transmitting the reply message.

The reply message transmitted by the 485DSS consists of six ASCII characters. The first character is the acknowledge character, an upper case "A" (decimal 65). The second and third characters represent the hexadecimal address of the 485DSS that sent the message. The address range is from 0 to 255 (HEX "00" to "FF"). The fourth character indicates the select state of 485DSS, a "0" (decimal 48) indicates the RS-232 port does not have a connection (not selected) to the network and a "1" (decimal 49) indicates the RS-232 port has a connection (selected) to the network. The fifth character indicates the state of the CTS handshake input line on pin 5 of the RS-232 port connector. A "0" (decimal 48) indicates a low state on the CTS input pin, and a "1" (decimal 49) indicates a high state on the CTS input pin. The sixth character is the end of message character, a carriage return (decimal 13).

Reply Syntax: A ___ ___ ___ ___ cr


				End of message char.
			Handshake input state.
		Select State.
	Least signf. address character.
Most signf. address character.

Start of message character.

When this command contains a specific address, the 485DSS whose address matches the command address will wait for twenty milliseconds before transmitting the reply message. If the command uses the broadcast characters to receive status from all 485DSS's on the network each 485DSS will delay transmitting its reply based on its address. The amount of delay is equal to the unit's address in decimal multiplied by twenty milliseconds then add an additional 20 milliseconds.

12	485DSS3298 Manual

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Select State.