B&B Electronics 485DSS manual Ack

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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.

Unit 17 decimal (11 hex) waited 360 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 high state.

485DSS3298 Manual

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B&B Electronics -- PO Box 1040 -- Ottawa, IL 61350

PH (815) 433-5100 -- FAX (815) 434-7094

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Contents Designed and Manufactured Ottawa, Illinois Electronics Mfg. Co. IncInternet Table of Contents Appendix C Cable Charts Checklist Hardware IntroductionPort Configuration SpecificationsRS-485/422 Port RS-422/485 Port Terminal Block Signal Description Direction RS-232 PortRS-422/485 Wiring Wire ModeComponent Values For Send Data Timing RS-485 Wiring Diagram Wire Mode Power Supply RS-422 Wiring Diagram RS-485 and RS-422 TerminationOperation Communication Configuration Distributed Smart Switch CommandsCommand String On CommandOFF Command Status Request CommandSelect State ACK Address Switch Setting the 485DSS AddressDIP Switch Binary File Transfer Hard Drive Installation Software DescriptionRunning Demonstration Program Type CD\485DSS\PASCAL and press the Enter keyAppendix a Ascii Character Codes Decimal to HEX to Ascii Conversion TableAppendix B Decimal/Hexadecimal/Conversions SymbolDec/Hex Conversions Decimal Hexadecimal Hexadecimal to Decimal Conversion Decimal to Hexadecimal ConversionAppendix C Cable Charts Chart 1. IBM PC DB25 Connector to 485DSS RS-232 DTE PortRS-232 DTE Port DB25 Connector Direction 485DSSRS-485/422 Direction Terminal BlocksClass a Equipment
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