B&B Electronics 485DSS manual Ack

Page 17

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.

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

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Contents Designed and Manufactured Ottawa, Illinois Electronics Mfg. Co. IncInternet 485DSS-0308 Manual CoverPage Table of Contents IiTable of Contents 485DSS-0308 Manual Hardware Introduction ChecklistRS-485/422 Port SpecificationsPort Configuration RS-232 Port RS-422/485 Port Terminal Block Signal Description DirectionSignal Ground +12VDC Power Supply Input RS-422/485 Wiring Clear to Send Input Signal GroundWire Mode Frame Ground Transmit Data Output Receive Data InputComponent Values For Send Data Timing RS-485 Wiring Diagram Wire Mode RS-422 Wiring Diagram RS-485 and RS-422 Termination Power SupplyOperation Distributed Smart Switch Commands Communication ConfigurationOn Command Command StringDecimal HexStatus Request Command OFF CommandPage ACK DIP Switch Setting the 485DSS AddressAddress Switch Binary File Transfer Software Description 485DSS-0308 Manual Appendix a Appendix a Ascii Character CodesPage Appendix B Decimal/Hexadecimal/Conversions SymbolDec/Hex Conversions Decimal Hexadecimal 485DSS-0308 Manual Appendix BDecimal to Hexadecimal Conversion Hexadecimal to Decimal ConversionChart 1. IBM PC DB25 Connector to 485DSS RS-232 DTE Port Appendix C Cable ChartsRS-232 DTE Port DB25 Connector Direction RS-232 DTE PortDevice Direction Terminal Blocks Chart 6. RS-485 2-Wire Device to 485DSS RS-485/422 PortRS-485/422
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