B&B Electronics 485DSS - Manual (Page 17)

485DSS-0308 Manual 13
B&B Electronics Mfg Co Inc – 707 Dayton Rd - PO Box 1040 - Ottawa IL 61350 - Ph 815-433-5100 - Fax 815-433-5104
B&B Electronics – Westlink Commercial Park – Oranmore, Galway, Ireland – Ph +353 91 792444 – Fax +353 91 792445
Example: A unit with a decimal address of ten will have a delay of
220 milliseconds [(10 x 0.02) + 0.02 = 0.22 seconds].
Command character: ACK (decimal 6)
Example 1: To request status from the 485DSS set to address 11 (
0B hex) decimal.
HOST transmits: Xoff “0” “B” ACK
( 19 48 66 6 decimal)
( 13 30 42 6 hex)
Reply: “A” “0” “B” “0” “1” cr
The reply indicates that the RS-232 port has no connection to the
network on unit 11 and the CTS handshake line is in the high state.
Example 2: Request status from all the 485DSS's on the network.
HOST transmits: Xoff DC2 DC2 ACK
( 19 18 18 6 decimal)
( 13 12 12 6 hex)
Reply: “A” “0” “1” “0” “0” cr
Reply: “A” “0” “2” “1” “0” cr
Reply: “A” “0” “3” “0” “0” cr
Reply: “A” “1” “1” “0” “1” cr
The reply indicates the following:
Unit 1 waited 40 milliseconds and then sent a reply indicating
no connection of the RS-232 port to the network and the CTS
handshake line is in the low state.
Unit 2 waited 60 milliseconds and then sent a reply indicating
connection of the RS-232 port to the network and the CTS
handshake line is in the low state.
Unit 3 waited 80 milliseconds and then sent a reply indicating
no connection of the RS-232 port to the network and the CTS
handshake line is in the low state.